Ewan McGregor
Rodney Copperbottom (voice)

Robin Williams
Fender (voice)

Halle Berry
Cappy (voice)

Amanda Bynes
Piper (voice)

Mel Brooks
Bigweld (voice)

Jim Broadbent
Madame Gasket (voice)

Greg Kinnear
Ratchet (voice)

Stanley Tucci
Herb Copperbottom (voice)

Dianne Wiest
Mrs. Copperbottom (voice)

Drew Carey
Crank (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)