Ryan Reynolds
as Michael Leslie "Berg" Bergen
Richard Ruccolo
as Peter "Pete" Dunville
Traylor Howard
as Sharon Carter Donnelly
Suzanne Cryer
as Ashley "Ash" Walker
Nathan Fillion
as Johnny Donnelly
Jillian Bach
as Irene
Julius Carry
as Bill
David Ogden Stiers
as Mr. Bauer
Giuseppe Andrews
as Germ
Jennifer Westfeldt
as Melissa