Celebrity Parents KJ Apa Is a Dad! 'Riverdale' Star and Model Clara Berry Welcome First Baby "I am the luckiest to have now two men of my life, filling my heart with this cosmic gigantic vast love," Berry wrote announcing the birth of son Sasha Vai Keneti Apa By Benjamin VanHoose Benjamin VanHoose Twitter Benjamin VanHoose is an Associate Editor on the Movies team at PEOPLE. He's worked at PEOPLE for over three years as a writer and reporter across our Entertainment, Lifestyle and News teams, covering everything from the Johnny Depp v. Amber Heard trial to the Oscars. He regularly covers red carpet events and has interviewed stars like Drew Barrymore, Ryan Reynolds and Kirsten Dunst. He previously worked as a copy editor at Topix Media Lab. People Editorial Guidelines Published on September 26, 2021 02:41 PM Share Tweet Pin Email Photo: Jean-Baptiste Lacroix/AFP/Getty; Stephane Cardinale/Corbis via Getty KJ Apa has graduated to fatherhood! The Riverdale star, 24, and model Clara Berry, 27, have welcomed their first baby together, a son named Sasha Vai Keneti Apa, born on Sept. 23. Berry confirmed her newborn's arrival in an adorable Instagram post on Sunday featuring the baby boy's hands. "He is a perfect perfection. I am the luckiest to have now two men of my life, filling my heart with this cosmic gigantic vast love. ❤️🔥," she wrote. RELATED GALLERY: Celebrity Babies Born in 2021 The couple was first romantically linked in August 2020 when Apa shared a series of nude photos featuring Berry while on vacation together at an undisclosed location. "There's nowhere else," the Clocks singer captioned the shots, which captured Berry lying on her stomach in front of a picturesque cliff and sunset in one photo and facing away from the camera with her arms stretched to the sky in another. Want to get the biggest stories from PEOPLE every weekday? Subscribe to our new podcast, PEOPLE Every Day, to get the essential celebrity, entertainment and human interest news stories Monday through Friday. In December, Apa called Berry his "love" while celebrating her 27th birthday. Posting a mirror selfie of the duo alongside two red heart emoji on his Instagram Story, he wrote in the caption at the time, "Happy birthday my love." They then revealed their pregnancy news in May, and Berry documented updates along the way, including several snapshots of her baby bump and photos cozied up with Apa.