Nick Jonas Goes from Baby Bro to Baby Daddy

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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.