Nick Jonas Goes from Baby Bro to Baby Daddy

Nick Jonas, the youngest of the uber famous Jonas Brothers, will appear on ABC's Last Man Standing as the absentee father of Mike's (Tim Allen) grandson, ET has learned.

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In the show's upcoming Christmas-themed episode, Nick plays Ryan, the jobless young man who bailed after fathering a child with Mike's daughter. Ryan tests Mike's patience when he suddenly reappears in his daughter's life around the holidays.

The freshman comedy drew in close to 5 million viewers when it premiered last month and has since received a full-season order from the alphabet network.

As an actor, Nick was last seen guest starring on the short-lived Matthew Perry comedy Mr. Sunshine, which also aired on ABC.