“Sunny” Stars Expecting Second Child

Kaitlin Olson and Rob McElhenney of "It's Always Sunny in Philadelphia" announced to PEOPLE magazine that they are making an addition to their growing family.

The couple, who play "Sweet" Dee and Mac on the FX comedy are expecting their second child this spring, joining 13-month-old big brother Axel Lee.

Olson told PEOPLE,  “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."