Kaitlin Olson And Rob McElhenney Are Expecting

Kaitlin Olson and Rob McElhenney are expecting their second child this spring, the couple tell PEOPLE exclusively. The new addition will join big brother Axel Lee, 13 months.

“We’re having a boy! We’re so happy that Axel gets to have a brother so close in age. And that I get to add another set of balls to my very, very male world,” Olson, jokes.

“We found out I was pregnant during my mom‘s birthday weekend in Ojai. I was instantly so proud of this baby for already knowing how to make someone else’s special day all about him.”