Patrick Dempsey

as Robert 'Bobby' Libner

Arye Gross

as Buddy Libner

Daniel Stern

as Marvin Libner

Annabeth Gish

as Tammy

Rita Taggart

as Betty Libner

Joseph Bologna

as Uncle Phil

Alan Arkin

as Fred Libner

James Gammon

as Dr. Sturgeon The Cadillac Surgeon