Pompeo and Ivery are also parents to daughters Sienna May, 2, and Stella Luna, 7.
The couple confirmed their son’s birth after being spotted in the Los Feliz area of Los Angeles Wednesday, on a hike with daughter Stella and their baby boy, whom Ivery carried in a front holder.
“Chris Ivery just fell a notch. I’ve got a new guy,” Pompeo captioned a sweet shot of Ivery and their newborn son snuggled up on Instagram.
Buzz of the new baby coming a bit after his birth is no shock. In 2014, the actress didn’t announce the arrival of daughter Sienna until two months after she was born.
This article originally appeared on PEOPLE.COM.