Credit: Jordan Strauss/

Jason Schwartzman is going to be a dad.

He has announced that he and his wife of one year, clothing designer Brady Cunningham, are expecting their first child together (the couple dated for three years before wedding).

"I have this mustache, and the reason I have this mustache is, when I was young, my father had a mustache ... growing up, it embarrassed me," the actor, 30, said of Jimmy Kimmel Live! Wednesday.

"I'm expecting a child in December..." he went on. "I decided to grow out this mustache, so when we take photos…my boy or girl, whatever it is ... they will be embarrassed. So I am now thinking of ways to embarrass my unborn child."