Brendan Fraser

Scorch Supernova (voice)

Jessica Alba

Lena (voice)

Rob Corddry

Gary Supernova (voice)

Steve Zahn

Hawk (voice)

Sarah Jessica Parker

Kira Supernova (voice)

Ricky Gervais

Mr Bing (voice)

Gregg Binkley

Ralph (voice) (uncredited)

Sofía Vergara

Gabby (voice)

Kaitlin Olson

3D Movie Girl (voice)

Ashley Eckstein

Alien (voice)

Craig Robinson

Doc (voice)

Jane Lynch

Io (voice)

Jonathan Morgan Heit

Kip Supernova (voice)

Chris Parnell

Hammer (voice)

William Shatner

General Shanker (voice)

Bob Bergen

3D Movie Guy (voice)

George Lopez

Thurman (voice)

Joshua Rush

Young Shanker (voice)

Doug Abrahams

Hazmat / Baabian Citizen (voice)

Sean Kenin

Radio Host (voice)

Bill Hader

Announcer (voice) (uncredited)