Ewan McGregor
Rodney Copperbottom (voice)

Halle Berry
Cappy (voice)

Greg Kinnear
Ratchet (voice)

Mel Brooks
Bigweld (voice)

Drew Carey
Crank (voice)

Amanda Bynes
Piper (voice)

Robin Williams
Fender (voice)

Jim Broadbent
Madame Gasket (voice)

Stanley Tucci
Herb Copperbottom (voice)

Dianne Wiest
Mrs. Copperbottom (voice)

Harland Williams
Lug (voice)

Jennifer Coolidge
Aunt Fanny (voice)

Paul Giamatti
Tim the Gate Guard (voice)

Natasha Lyonne
Loretta Geargrinder (voice)

Chris Wedge
Wonderbot / Phone Booth (voice)

Dan Hedaya
Mr. Gunk (voice)

Marshall Efron
Lamppost / Toilet Bot / Bass Drum / Microphone

Terry Bradshaw
Broken Arm Bot (voice)

Al Roker
Mailbox (voice)

Lucille Bliss
Pigeon Lady (voice)