The 39 year old's wife, Rachel Reichard, is pregnant with the couple's first child, and Chris, whose character is a new father on the hit TV drama, shared the big news on Friday, January 24, 2020, posting his unborn baby's sonogram on Instagram.
"WE'RE HAVING OUR FIRST BABY!" Sullivan wrote.
Reichard, a film producer, also took to social media to share the news, adding: "It's TRUE!!! You heard it from @sullivangrams we are having a BOY!!"
"So excited!! Nursery is in the works, names are being workshopped, doulas are being interviewed, naps are my go-to self care bc I'm just so (tired), so much to do and yet so much not to do, just enjoying the moment... life is good!"