Cuoco, 37, showcased her daughter, Matilda Carmine Richie Pelphrey in an Instagram post, calling the infant “the new light of our lives,” People reported.
“We are overjoyed and grateful for this little miracle,” Cuoco wrote on social media.
Cuoco and Pelphrey met at the “Ozark” premiere in April 2022, according to People. Cuoco told Extra at the premiere of her movie, “Meet Cute,” that her manager introduced them.
Pelphrey, 40, also posted photographs of the couple’s baby in an Instagram post.
“My heart is full of love and gratitude for this miracle,” Pelphrey wrote. “Eternally grateful for the strength and bravery of my soulmate and best friend @kaleycuoco. You are incredible.”
According to “Today,” Cuoco was previously married to tennis player Ryan Sweeting. She also was also married to Karl Cook for three years but they split more than a year ago.
Cuoco and Pelphrey announced they were expecting their first child together in an Oct. 11 post on Instagram.
Photos: Kaley Cuoco through the years LOS ANGELES, CA - OCTOBER 22: Kaley Cuoco attends the 2018 InStyle Awards at The Getty Center on October 22, 2018 in Los Angeles, California. (Photo by Matt Winkelmeyer/Getty Images for InStyle) (Matt Winkelmeyer/Getty Images for InStyle)
Photos: Kaley Cuoco through the years SANTA MONICA, CA - JANUARY 13: Kaley Cuoco poses in the press room during the 24th annual Critics' Choice Awards at Barker Hangar on January 13, 2019 in Santa Monica, California. (Photo by Frazer Harrison/Getty Images) (Frazer Harrison/Getty Images)
Photos: Kaley Cuoco through the years PACIFIC PALISADES, CA - OCTOBER 06: Kaley Cuoco attends the 9th Annual Veuve Clicquot Polo Classic Los Angeles at Will Rogers State Historic Park on October 6, 2018 in Pacific Palisades, California. (Photo by Jon Kopaloff/Getty Images,) (Jon Kopaloff/Getty Images,)
Photos: Kaley Cuoco through the years VAN NUYS, CALIFORNIA - MAY 05: Kaley Cuoco attends as the John Ritter Foundation for Aortic Health hosts an Evening from the Heart LA 2022 Gala at Valley Relics Museum on May 05, 2022 in Van Nuys, California. (Photo by Araya Doheny/Getty Images) (Araya Doheny/Getty Images)
Photos: Kaley Cuoco through the years WEST HOLLYWOOD, CALIFORNIA - APRIL 12: Kaley Cuoco attends the Los Angeles Season 2 Premiere Of HBO Max Original Series "The Flight Attendant" at Pacific Design Center on April 12, 2022 in West Hollywood, California. (Photo by Jon Kopaloff/Getty Images) (Jon Kopaloff/Getty Images)
Photos: Kaley Cuoco through the years PASADENA, CALIFORNIA - MAY 01: Kaley Cuoco attends the series finale party for CBS' "The Big Bang Theory" at The Langham Huntington, Pasadena on May 01, 2019 in Pasadena, California. (Photo by Alberto E. Rodriguez/Getty Images) (Alberto E. Rodriguez/Getty Images)
Photos: Kaley Cuoco through the years HOLLYWOOD, CA - MARCH 21: Kaley Cuoco attends the 2018 PaleyFest Los Angeles - CBS's 'The Big Bang Theory' And 'Young Sheldon' on March 21, 2018 in Hollywood, California. (Photo by Christopher Polk/Getty Images) (Christopher Polk/Getty Images)
Photos: Kaley Cuoco through the years LOS ANGELES, CALIFORNIA - OCTOBER 21: Kaley Cuoco attends the 2019 InStyle Awards at The Getty Center on October 21, 2019 in Los Angeles, California. (Photo by Jon Kopaloff/Getty Images) (Jon Kopaloff/Getty Images)
Photos: Kaley Cuoco through the years LOS ANGELES, CALIFORNIA - SEPTEMBER 19: Kaley Cuoco attends the 73rd Primetime Emmy Awards at L.A. LIVE on September 19, 2021 in Los Angeles, California. (Photo by Rich Fury/Getty Images) (Rich Fury/Getty Images)
Photos: Kaley Cuoco through the years BEVERLY HILLS, CA - JANUARY 06: Kaley Cuoco attends the 76th Annual Golden Globe Awards at The Beverly Hilton Hotel on January 6, 2019 in Beverly Hills, California. (Photo by Jon Kopaloff/Getty Images) (Jon Kopaloff/Getty Images)
Photos: Tom Pelphrey through the years Check out these memorable photos of "Ozark" star Tom Pelphrey through the years. (Mike Coppola/Getty Images)
Photos: Tom Pelphrey through the years 2005: Actors Crystal Hunt and Tom Pelphrey arrive to the opening of "Little Women - The Musical" on January 23, 2005, in New York City. (Bryan Bedder/Getty Images)
Photos: Tom Pelphrey through the years 2006: Tom Pelphrey, winner Outstanding Younger Actor in a Drama Series award for "Guiding Light," and actress Gina Tognoni, winner Outstanding Supporting Actress in a Drama Series award for "Guiding Light," pose in the press room at the 33rd annual Daytime Emmy Awards held at the Kodak Theatre on April 28, 2006, in Hollywood, California. (Frederick M. Brown/Getty Images)
Photos: Tom Pelphrey through the years 2008: Actor Tom Pelphrey accepts the award for Outstanding Younder Actor during the 35th annual Daytime Emmy Awards held at the Kodak Theatre on June 20, 2008, in Hollywood, California. (Vince Bucci/Getty Images)
Photos: Tom Pelphrey through the years 2012: Jay Russell, Tom Pelphrey, Tracie Bennett and Michael Cumptsy attend the after party for the "End of the Rainbow" Broadway opening night at The Plaza Hotel on April 2, 2012, in New York City. (Fernando Leon/Getty Images)
Photos: Tom Pelphrey through the years 2015: Actor Tom Pelphrey attends the "Fool For Love" Broadway opening night after party at Urbo NYC on October 8, 2015, in New York City. (Brad Barket/Getty Images)
Photos: Tom Pelphrey through the years 2016: Actors Ana Ayora and Tom Pelphrey attend the after party for the premiere of Cinemax's "Banshee" Fourth Season at UTA on March 31, 2016, in Beverly Hills, California. (Alberto E. Rodriguez/Getty Images)
Photos: Tom Pelphrey through the years 2018: Gersh Agency Co-President Bob Gersh and Tom Pelphrey attend the Gersh Upfronts Party 2018 at The Bowery Hotel on May 15, 2018, in New York City. (Jared Siskin/Getty Images for Gersh)
Photos: Tom Pelphrey through the years 2022: Tom Pelphrey, Jason Bateman, Laura Linney and Jessica Frances Dukes attend the Premiere of "Ozark" S4 presented by Netflix at Paris Theatre on April 21, 2022, in New York City. (Monica Schipper/Getty Images for Netflix)
Photos: Tom Pelphrey through the years 2022: Tom Pelphrey and Kaley Cuoco attends the 74th Primetime Emmys at Microsoft Theater on September 12, 2022, in Los Angeles. (Momodu Mansaray/Getty Images)