Credit: Casey Rodgers/

Bust out the pretty pink onesies!

A rep for Jason Schwartzman tells the actor and wife Brady Cunningham welcomed their first child, daughter Marlowe Rivers in L.A. December 4.

The Bored to Death star, 30, told Us in September he was looking forward to the birth "because we don't know the sex of our baby so that's going to be a great moment."

Schwartzman, who wed the fashion designer in July 2009, added that he was excited to show his new little tot around their home.

"I read a book that said you're supposed to do that -- it's called The Baby Whisperer," he told Us. "You're supposed to take the baby around and be like, 'This is the bathroom. And this is the living room.' I was like, 'Really?'"

And when his baby girl grows up? "I can't wait to get crunked when it's old enough," he joked.