"Riverdale" star KJ Apa and his girlfriend, Clara Berry, welcomed their first child together last week.
"Sasha Vai Keneti Apa, born on the 23rd of September," the French model shared Sunday on Instagram alongside a photo of the baby's tiny hand clutching her finger.
MORE: 'Riverdale' star KJ Apa shows reality of kissing scenes amid COVID-19"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 continued.
Apa himself took to Instagram on Sunday to share a video in which he thanked fans for their support of his new album, "Clocks," which he noted was released the day his son was born.
The 24-year-old New Zealander added that baby Sasha is "doing good" and Berry is "doing amazing."
The couple's family update caught the attention of Apa's "Riverdale" castmates -- including Lili Reinhart, Camila Mendes, Madelaine Petsch and Vanessa Morgan -- who took to the comments of their posts to share their congrats.
Apa and Berry have been dating since 2020. The couple announced the pregnancy in May.