The multiple Tony Award-nominee and her actor husband John Ellison Conlee welcomed a son last month (Apr15), and shared the happy news on on Monday (11May15).

Keenan-Bolger posted a black-and-white photo of their sleeping tot, and added the caption, "You guys, this happened. William Emmet Conlee was born 4/29 at 10:21am. 8lbs 2oz and 20 3/4in. We are IN LOVE."

While the new parents are thrilled with the new addition to their family, Keenan-Bolger previously admitted to that the decision to become a parent was a difficult one to make, since both she and her husband are devoted to their successful careers.

She said, "The decision to have a baby was a complicated one for me. I feel like I've known my entire life that I wanted to be a mother. What I didn't account for was how much I love being an actor and a wife. I had a lot of anxiety that having a baby would mean sacrifice in both of those areas."