Peter's Hairless Twin is a twin brother Peter Griffin keeps locked up in a storm shed. When Carter Pewterschmidt stops by in "Fresh Heir" to announce that he has made Chris Griffin the sole heir to the Pewterschmidt fortune, the family hears a crash. Peter goes out with a shotgun, but after a shot is heard fired, the hairless twin returns alone and offers the family all the garbage they can eat.

Voiced by Seth MacFarlane.