According to People magazine and the Independent, the 38-year-old Middleton, who attended the Party at the Palace concert Saturday during Queen Elizabeth II’s Platinum Jubilee, and husband James Matthews, 46, are expecting their third child together.
Middleton has not confirmed the news publicly, and a spokesperson declined to comment after being contacted by People magazine.
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Photos: Pippa Middleton through the years Here are some memorable photos of Pippa Middleton, sister of Catherine, the Duchess of Cambridge, through the years. (AP Photo/Kirsty Wigglesworth, Pool)
Photos: Pippa Middleton through the years 2010: Pippa Middleton (right) attends the Issa catwalk show during London Fashion Week on February 23, 2010, in London. (Stuart Wilson/Getty Images)
Photos: Pippa Middleton through the years 2011: Kate Middleton waves to the crowds as her sister and maid of honor, Pippa Middleton, holds her dress before walking in to the Abbey to attend the royal wedding of Prince William to Kate Middleton at Westminster Abbey on April 29, 2011, in London. (Pascal Le Segretain/Getty Images)
Photos: Pippa Middleton through the years 2012: Pippa Middleton (left) and Catherine, Duchess of Cambridge, sit in the Royal Box during the Gentlemen's Singles final match between Roger Federer of Switzerland and Andy Murray of Great Britain on Day 13 of the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club on July 8, 2012, in London. (Clive Brunskill/Getty Images)
Photos: Pippa Middleton through the years 2013: Pippa Middleton and friend Tom Kingston watch the Queens Mother Champion Steeple Chase on Day 3 of the Cheltenham Festival at Cheltenham Racecourse on March 14, 2013, in Cheltenham, England. (Danny Martindale/Getty Images)
Photos: Pippa Middleton through the years 2014: Pippa Middleton is seen with her brother, James Middleton, after finishing the Race Across America 2014 on June 20, 2014, in Annapolis, Maryland. (Larry French/Getty Images)
Photos: Pippa Middleton through the years 2015: Pippa Middleton finishes the London to Brighton Bike Ride for the British Heart Foundation on June 21, 2015, in Brighton, England. (Anthony Harvey/Getty Images)
Photos: Pippa Middleton through the years 2016: Pippa Middleton attends the British Heart Foundation: Roll out the Red Ball at the Savoy Hotel on February 11, 2016, in London. (Ian Gavan/Getty Images)
Photos: Pippa Middleton through the years 2017: Pippa Middleton and her new husband, James Matthews, leave church following their wedding ceremony at St. Mark's Church as the bridesmaids and pageboys walk ahead on May 20, 2017, in Englefield Green, England. (Justin Tallis - WPA Pool/Getty Images)
Photos: Pippa Middleton through the years 2018: Pippa Middleton and James Matthews arrive for the wedding ceremony of Britain's Prince Harry and actress Meghan Markle at St. George's Chapel, Windsor Castle on May 19, 2018, in Windsor, England. (Chris Radburn - WPA Pool/Getty Images)
Photos: Pippa Middleton through the years 2019: Pippa Middleton attends the British Heart Foundation Beating Hearts Ball at Guildhall on February 27, 2019, in London. (Stuart C. Wilson/Getty Images)
Photos: Pippa Middleton through the years 2021: Pippa Middleton and her husband, James Matthews, look on from the stands during the Men's Singles Semi-Final match between Matteo Berrettini of Italy and Hubert Hurkacz of Poland during Day Eleven of The Championships - Wimbledon 2021 at All England Lawn Tennis and Croquet Club on July 9, 2021, in London. (Clive Brunskill/Getty Images)
Photos: Pippa Middleton through the years 2022: Pippa Middleton, sister of the Duchess of Cambridge, attends the Platinum Jubilee concert taking place in front of Buckingham Palace, London, Saturday June 4, 2022, on the third of four days of celebrations to mark the Platinum Jubilee. (Chris Jackson/Pool via AP)
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Platinum Jubilee concert in photos Duran Duran and Nile Rodgers perform during the Platinum Jubilee concert taking place in front of Buckingham Palace, London, Saturday June 4, 2022, on the third of four days of celebrations to mark the Platinum Jubilee. The events over a long holiday weekend in the U.K. are meant to celebrate Queen Elizabeth II’s 70 years of service. (Jonathan Buckmaster/Pool Photo via AP) (Jonathan Buckmaster/AP)
Platinum Jubilee concert in photos Prince William and Kate, Duchess of Cambridge with their children Prince George and Princess Charlotte attend the Platinum Jubilee concert taking place in front of Buckingham Palace, London, Saturday June 4, 2022, on the third of four days of celebrations to mark the Platinum Jubilee. The events over a long holiday weekend in the U.K. are meant to celebrate Queen Elizabeth II’s 70 years of service. (Hannah McKay/Pool Photo via AP) (Hannah McKay/AP)
Platinum Jubilee concert in photos A royal fan is seen prior to the Platinum Jubilee concert which takes place in front of Buckingham Palace, London, Saturday June 4, 2022, on the third of four days of celebrations to mark the Platinum Jubilee. The events over a long holiday weekend in the U.K. are meant to celebrate Queen Elizabeth II's 70 years of service. (AP Photo/Alberto Pezzali) (Frank Augstein/AP)
Platinum Jubilee concert in photos Jax Jones performs at the Platinum Jubilee concert taking place in front of Buckingham Palace, London, Saturday June 4, 2022, on the third of four days of celebrations to mark the Platinum Jubilee. The events over a long holiday weekend in the U.K. are meant to celebrate Queen Elizabeth II's 70 years of service. (Henry Nicholls/Pool via AP) (Henry Nicholls/AP)
Platinum Jubilee concert in photos George Ezra performs at the Platinum Jubilee concert taking place in front of Buckingham Palace, London, Saturday June 4, 2022, on the third of four days of celebrations to mark the Platinum Jubilee. The events over a long holiday weekend in the U.K. are meant to celebrate Queen Elizabeth II's 70 years of service. (AP Photo/Alastair Grant, Pool) (Alastair Grant/AP)
Platinum Jubilee concert in photos Royal fans wave flags as they gather on the Mall near Buckingham Palace, London, Saturday June 4, 2022 ahead of the Platinum Jubilee concert, on the third of four days of celebrations to mark the Platinum Jubilee. The events over a long holiday weekend in the U.K. are meant to celebrate Queen Elizabeth II's 70 years of service. (AP Photo/Frank Augstein) (Frank Augstein/AP)
Platinum Jubilee concert in photos Simon Le Bon, right, and members of the band Duran Duran perform at the Platinum Jubilee concert taking place in front of Buckingham Palace, London, Saturday June 4, 2022, on the third of four days of celebrations to mark the Platinum Jubilee. The events over a long holiday weekend in the U.K. are meant to celebrate Queen Elizabeth II's 70 years of service. (AP Photo/Alastair Grant, Pool) (Alastair Grant/AP)
Platinum Jubilee concert in photos Mayor of London Sadiq Khan and his wife Saadiya Ahmed arrive at the Platinum Jubilee concert taking place in front of Buckingham Palace, London, Saturday June 4, 2022, on the third of four days of celebrations to mark the Platinum Jubilee. The events over a long holiday weekend in the U.K. are meant to celebrate Queen Elizabeth II’s 70 years of service. (Eddie Mulholland/Pool photo via AP) (Eddie Mulholland/AP)
Platinum Jubilee concert in photos British MP Priti Patel shouts out during the Platinum Jubilee concert, taking place in front of Buckingham Palace, London, Saturday June 4, 2022, on the third of four days of celebrations to mark the Platinum Jubilee. The events over a long holiday weekend in the U.K. are meant to celebrate Queen Elizabeth II’s 70 years of service. (Hannah McKay/Pool Photo via AP) (Hannah McKay/AP)
Platinum Jubilee concert in photos Guy Garvey of the band Elbow performs at the Platinum Jubilee concert taking place in front of Buckingham Palace, London, Saturday June 4, 2022, on the third of four days of celebrations to mark the Platinum Jubilee. The events over a long holiday weekend in the U.K. are meant to celebrate Queen Elizabeth II's 70 years of service. (AP Photo/Alastair Grant, Pool) (Alastair Grant/AP)
Platinum Jubilee concert in photos Mimi Webb performs at the Platinum Jubilee concert taking place in front of Buckingham Palace, London, Saturday June 4, 2022, on the third of four days of celebrations to mark the Platinum Jubilee. The events over a long holiday weekend in the U.K. are meant to celebrate Queen Elizabeth II's 70 years of service. (AP Photo/Alastair Grant, Pool) (Alastair Grant/AP)
Platinum Jubilee concert in photos Actors from the musical Phantom of the Opera perform at the Platinum Jubilee concert taking place in front of Buckingham Palace, London, Saturday June 4, 2022, on the third of four days of celebrations to mark the Platinum Jubilee. The events over a long holiday weekend in the U.K. are meant to celebrate Queen Elizabeth II's 70 years of service. (AP Photo/Alastair Grant, Pool) (Alastair Grant/AP)
Platinum Jubilee concert in photos From right center, Prince William, Prince George, Princess Charlotte and Kate, Duchess of Cambridge watch the Platinum Jubilee concert taking place in front of Buckingham Palace, London, Saturday June 4, 2022, on the third of four days of celebrations to mark the Platinum Jubilee. The events over a long holiday weekend in the U.K. are meant to celebrate Queen Elizabeth II's 70 years of service. (Chris Jackson/Pool via AP) (Chris Jackson/AP)
Platinum Jubilee concert in photos Queen guitarist Brian May performs during the Platinum Jubilee concert taking place in front of Buckingham Palace, London, Saturday June 4, 2022, on the third of four days of celebrations to mark the Platinum Jubilee. The events over a long holiday weekend in the U.K. are meant to celebrate Queen Elizabeth II’s 70 years of service. (Jonathan Buckmaster/Pool Photo via AP) (Jonathan Buckmaster/AP)
Platinum Jubilee concert in photos Diversity performs during the Platinum Jubilee concert taking place in front of Buckingham Palace, London, Saturday June 4, 2022, on the third of four days of celebrations to mark the Platinum Jubilee. The events over a long holiday weekend in the U.K. are meant to celebrate Queen Elizabeth II’s 70 years of service. (Hannah McKay/Pool Photo via AP) (Hannah McKay/AP)
Platinum Jubilee concert in photos Rod Stewart performs at the Platinum Jubilee concert taking place in front of Buckingham Palace, London, Saturday June 4, 2022, on the third of four days of celebrations to mark the Platinum Jubilee. The events over a long holiday weekend in the U.K. are meant to celebrate Queen Elizabeth II's 70 years of service. (AP Photo/Alastair Grant, Pool) (Alastair Grant/AP)
Platinum Jubilee concert in photos Craig David performs during the Platinum Jubilee concert taking place in front of Buckingham Palace, London, Saturday June 4, 2022, on the third of four days of celebrations to mark the Platinum Jubilee. The events over a long holiday weekend in the U.K. are meant to celebrate Queen Elizabeth II’s 70 years of service. (Eddie Mulholland/Pool photo via AP) (Eddie Mulholland/AP)
Platinum Jubilee concert in photos Brian May leaves the stage at the Platinum Jubilee concert taking place in front of Buckingham Palace, London, Saturday June 4, 2022, on the third of four days of celebrations to mark the Platinum Jubilee. The events over a long holiday weekend in the U.K. are meant to celebrate Queen Elizabeth II's 70 years of service. (AP Photo/Alastair Grant, Pool) (Alastair Grant/AP)
Platinum Jubilee concert in photos Royal fans gather on the Mall near Buckingham Palace, London, Saturday June 4, 2022 ahead of the Platinum Jubilee concert, on the third of four days of celebrations to mark the Platinum Jubilee. The events over a long holiday weekend in the U.K. are meant to celebrate Queen Elizabeth II's 70 years of service. (AP Photo/Frank Augstein) (Frank Augstein/AP)
Platinum Jubilee concert in photos Queen Elizabeth II is seen onscreen at the Platinum Jubilee concert taking place in front of Buckingham Palace, London, Saturday June 4, 2022, on the third of four days of celebrations to mark the Platinum Jubilee. The events over a long holiday weekend in the U.K. are meant to celebrate Queen Elizabeth II's 70 years of service. (AP Photo/Alastair Grant, Pool) (Alastair Grant/AP)
Platinum Jubilee concert in photos Royal fans take a nap as they queue on the Mall near Buckingham Palace, London, Saturday June 4, 2022 ahead of the Platinum Jubilee concert, on the third of four days of celebrations to mark the Platinum Jubilee. The events over a long holiday weekend in the U.K. are meant to celebrate Queen Elizabeth II's 70 years of service. (AP Photo/Frank Augstein) (Frank Augstein/AP)
Platinum Jubilee concert in photos Adam Lambert performs with Queen during the Platinum Jubilee concert taking place in front of Buckingham Palace, London, Saturday June 4, 2022, on the third of four days of celebrations to mark the Platinum Jubilee. The events over a long holiday weekend in the U.K. are meant to celebrate Queen Elizabeth II’s 70 years of service. (Eddie Mulholland/Pool photo via AP) (Eddie Mulholland/AP)
Platinum Jubilee concert in photos Royal fans gather on the Mall near Buckingham Palace, London, Saturday June 4, 2022 ahead of the Platinum Jubilee concert, on the third of four days of celebrations to mark the Platinum Jubilee. The events over a long holiday weekend in the U.K. are meant to celebrate Queen Elizabeth II's 70 years of service. (AP Photo/Frank Augstein) (Frank Augstein/AP)
Platinum Jubilee concert in photos Jason Donovan performs during the Platinum Jubilee concert taking place in front of Buckingham Palace, London, Saturday June 4, 2022, on the third of four days of celebrations to mark the Platinum Jubilee. The events over a long holiday weekend in the U.K. are meant to celebrate Queen Elizabeth II’s 70 years of service. (Humphrey Nemar/Pool photo via AP) (Humphrey Nemar /AP)
Platinum Jubilee concert in photos Actors from the musical Hamilton perform at the Platinum Jubilee concert taking place in front of Buckingham Palace, London, Saturday June 4, 2022, on the third of four days of celebrations to mark the Platinum Jubilee. The events over a long holiday weekend in the U.K. are meant to celebrate Queen Elizabeth II's 70 years of service. (AP Photo/Alastair Grant, Pool) (Alastair Grant/AP)
Platinum Jubilee concert in photos Ashley Banjo of the group Diversity performs at the Platinum Jubilee concert taking place in front of Buckingham Palace, London, Saturday June 4, 2022, on the third of four days of celebrations to mark the Platinum Jubilee. The events over a long holiday weekend in the U.K. are meant to celebrate Queen Elizabeth II's 70 years of service. (AP Photo/Alastair Grant, Pool) (Alastair Grant/AP)
Platinum Jubilee concert in photos Mabel, center, performs at the Platinum Jubilee concert taking place in front of Buckingham Palace, London, Saturday June 4, 2022, on the third of four days of celebrations to mark the Platinum Jubilee. The events over a long holiday weekend in the U.K. are meant to celebrate Queen Elizabeth II's 70 years of service. (AP Photo/Alastair Grant, Pool) (Alastair Grant/AP)
Platinum Jubilee concert in photos A royal fan with face paint and colored hair is seen prior to the Platinum Jubilee concert which takes place in front of Buckingham Palace, London, Saturday June 4, 2022, on the third of four days of celebrations to mark the Platinum Jubilee. The events over a long holiday weekend in the U.K. are meant to celebrate Queen Elizabeth II's 70 years of service. (AP Photo/Alberto Pezzali) (Frank Augstein/AP)
Platinum Jubilee concert in photos Britain's Prince William and Prince George watch the Platinum Jubilee concert taking place in front of Buckingham Palace, London, Saturday June 4, 2022, on the third of four days of celebrations to mark the Platinum Jubilee. The events over a long holiday weekend in the U.K. are meant to celebrate Queen Elizabeth II's 70 years of service. (Henry Nicholls/Pool via AP) (Henry Nicholls/AP)
Platinum Jubilee concert in photos Royal fans gather on the Mall near Buckingham Palace, London, Saturday June 4, 2022 ahead of the Platinum Jubilee concert, on the third of four days of celebrations to mark the Platinum Jubilee. The events over a long holiday weekend in the U.K. are meant to celebrate Queen Elizabeth II's 70 years of service. (AP Photo/Frank Augstein) (Frank Augstein/AP)
Platinum Jubilee concert in photos Stefflon Don performs at the Platinum Jubilee concert taking place in front of Buckingham Palace, London, Saturday June 4, 2022, on the third of four days of celebrations to mark the Platinum Jubilee. The events over a long holiday weekend in the U.K. are meant to celebrate Queen Elizabeth II's 70 years of service. (AP Photo/Alastair Grant, Pool) (Alastair Grant/AP)
Platinum Jubilee concert in photos Jason Donovan performs with actors from the musical Joseph and the Amazing Technicolor Dreamcoat at the Platinum Jubilee concert taking place in front of Buckingham Palace, London, Saturday June 4, 2022, on the third of four days of celebrations to mark the Platinum Jubilee. The events over a long holiday weekend in the U.K. are meant to celebrate Queen Elizabeth II's 70 years of service. (AP Photo/Alastair Grant, Pool) (Alastair Grant/AP)
Platinum Jubilee concert in photos Nuns walk on the Mall near Buckingham Palace, London, Saturday June 4, 2022 ahead of the Platinum Jubilee concert, on the third of four days of celebrations to mark the Platinum Jubilee. The events over a long holiday weekend in the U.K. are meant to celebrate Queen Elizabeth II's 70 years of service. (AP Photo/Frank Augstein) (Frank Augstein/AP)
Platinum Jubilee concert in photos Sam Ryder performs during the Platinum Jubilee concert taking place in front of Buckingham Palace, London, Saturday June 4, 2022, on the third of four days of celebrations to mark the Platinum Jubilee. The events over a long holiday weekend in the U.K. are meant to celebrate Queen Elizabeth II’s 70 years of service. (Jonathan Buckmaster/Pool Photo via AP) (Jonathan Buckmaster/AP)
Platinum Jubilee concert in photos Royal fans watch Queen Elizabeth II onscreen during the Platinum Jubilee concert taking place in front of Buckingham Palace, London, Saturday June 4, 2022, on the third of four days of celebrations to mark the Platinum Jubilee. The events over a long holiday weekend in the U.K. are meant to celebrate Queen Elizabeth II's 70 years of service. (AP Photo/Frank Augstein) (Frank Augstein/AP)
Platinum Jubilee concert in photos Jason Donovan, front center, performs with actors from the musical Joseph and the Amazing Technicolor Dreamcoat at the Platinum Jubilee concert taking place in front of Buckingham Palace, London, Saturday June 4, 2022, on the third of four days of celebrations to mark the Platinum Jubilee. The events over a long holiday weekend in the U.K. are meant to celebrate Queen Elizabeth II's 70 years of service. (AP Photo/Alastair Grant, Pool) (Alastair Grant/AP)
Platinum Jubilee concert in photos Adam Lambert, center, from the band Queen performs with the Royal Marine drummers at the Platinum Jubilee concert taking place in front of Buckingham Palace, London, Saturday June 4, 2022, on the third of four days of celebrations to mark the Platinum Jubilee. The events over a long holiday weekend in the U.K. are meant to celebrate Queen Elizabeth II's 70 years of service. (AP Photo/Alastair Grant, Pool) (Alastair Grant/AP)
Platinum Jubilee concert in photos Royal fans watch Queen Elizabeth II on a screen in St. James park, London, Saturday June 4, 2022, on the third of four days of celebrations to mark the Platinum Jubilee. The events over a long holiday weekend in the U.K. are meant to celebrate Queen Elizabeth II's 70 years of service. (AP Photo/Frank Augstein) (Frank Augstein/AP)
Platinum Jubilee concert in photos A Royal fan holds two pints of lager on the Mall near Buckingham Palace, London, Saturday June 4, 2022 ahead of the Platinum Jubilee concert, on the third of four days of celebrations to mark the Platinum Jubilee. The events over a long holiday weekend in the U.K. are meant to celebrate Queen Elizabeth II's 70 years of service. (AP Photo/Frank Augstein) (Frank Augstein/AP)
Platinum Jubilee concert in photos Crowds on the Mall watch the Platinum Jubilee concert, taking place in front of Buckingham Palace, London, Saturday June 4, 2022, on the third of four days of celebrations to mark the Platinum Jubilee. The events over a long holiday weekend in the U.K. are meant to celebrate Queen Elizabeth II’s 70 years of service. (Niklas Halle'n/Pool Photo via AP) (Niklas Halle'n/AP)
Platinum Jubilee concert in photos Royal fans gather on the Mall near Buckingham Palace, London, Saturday June 4, 2022 ahead of the Platinum Jubilee concert, on the third of four days of celebrations to mark the Platinum Jubilee. The events over a long holiday weekend in the U.K. are meant to celebrate Queen Elizabeth II's 70 years of service. (AP Photo/Frank Augstein) (Frank Augstein/AP)
Platinum Jubilee concert in photos Crowds on the Mall watch the Platinum Jubilee concert, taking place in front of Buckingham Palace, London, Saturday June 4, 2022, on the third of four days of celebrations to mark the Platinum Jubilee. The events over a long holiday weekend in the U.K. are meant to celebrate Queen Elizabeth II’s 70 years of service. (Niklas Halle'n/Pool Photo via AP) (Niklas Halle'n/AP)
Platinum Jubilee concert in photos British Prime Minister Boris Johnson and his wife Carrie Johnson arrive for the Platinum Jubilee concert taking place in front of Buckingham Palace, London, Saturday June 4, 2022, on the third of four days of celebrations to mark the Platinum Jubilee. The events over a long holiday weekend in the U.K. are meant to celebrate Queen Elizabeth II’s 70 years of service. (Hannah McKay/Pool Photo via AP) (Hannah McKay/AP)
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