Taylor Kitsch

as Sam (voice)

Jennette McCurdy

as Sue (voice)

Rena Strober

as Computer Voice (voice)

Carla Gugino

as Catherine (voice)

James Woods

as Victor (voice)

Jason Kravits

as Oscar (voice)

Tom Green

as Okra (voice)

Jon Heder

as Wilmer (voice)

Jason Mewes

as Kit (voice)

Jim Breuer

as Mr.Glump (voice)

Phil LaMarr

as Additional Voices (voice)

Lex Lang

as Ox King (voice)

Steve Kramer

as Zang (voice)

Dave B. Mitchell

as Police01 (voice)

Alicyn Packard

as Cancan Robot (voice)

Richard Epcar

as Captain Black (voice)

Derek Stephen Prince

as Clerk (voice)

Cassandra Lee Morris

as Additional Voices (voice)

Doug Erholtz

as Additional Voices (voice)

Ezra Weisz

as Additional Voices (voice)

Sandy Fox

as Additional Voices (voice)

Richard Cansino

as Additional Voices (voice)

Rebecca Forstadt

as Additional Voices (voice)

Ellyn Stern

as Additional Voices (voice)

Kaiji Tang

as Additional Voices (voice)

Phil Morris

as Additional Voices (voice)