cast
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Ewan McGregor
Rodney Copperbottom (voice)
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Halle Berry
Cappy (voice)
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Greg Kinnear
Ratchet (voice)
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Mel Brooks
Bigweld (voice)
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Drew Carey
Crank (voice)
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Amanda Bynes
Piper (voice)
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Robin Williams
Fender (voice)
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Jim Broadbent
Madame Gasket (voice)
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Stanley Tucci
Herb Copperbottom (voice)
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Dianne Wiest
Mrs. Copperbottom (voice)
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Harland Williams
Lug (voice)
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Jennifer Coolidge
Aunt Fanny (voice)
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Paul Giamatti
Tim the Gate Guard (voice)
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Natasha Lyonne
Loretta Geargrinder (voice)
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Chris Wedge
Wonderbot / Phone Booth (voice)
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Dan Hedaya
Mr. Gunk (voice)
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Marshall Efron
Lamppost / Toilet Bot / Bass Drum / Microphone
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Terry Bradshaw
Broken Arm Bot (voice)
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Al Roker
Mailbox (voice)
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Lucille Bliss
Pigeon Lady (voice)
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Jay Leno
Fire Hydrant (voice)
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Lowell Ganz
Mr. Gasket (voice)
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Paula Abdul
Watch (voice)
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Jackie Hoffman
Water Cooler (voice)
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Brian Scott McFadden
Trashcan Bot (voice)
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Tim Nordquist
Tin Man (voice)
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James Earl Jones
Voice Box at Hardware Store (voice)
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Damien Fahey
Stage Announcer (voice)
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Stephen Tobolowsky
Bigmouth Executive / Forge (voice)
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Jansen Panettiere
Younger Rodney (voice)
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Will Denton
Young Rodney (voice)
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Crawford Wilson
Young Rodney (voice)
- Dylan Denton Youngest Rodney (voice)
- Jennifer Perito Additional Voices
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Alan Rosenberg
Jack Hammer (voice)
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Lara Cody
Additional Voices
- Cooper Cowgill Additional Voices
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David Crommett
Additional Voices
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Darin De Paul
Additional Voices
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Dann Fink
Additional Voices
- Timothy Gulan Additional Voices
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Ray Iannicelli
Additional Voices
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Sondra James
Additional Voices
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Vanessa Lemonides
Additional Voices
- Marcus Maurice Additional Voices
- David Rossmer Additional Voices
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Bruce Winant
Additional Voices / ADR Loop Group
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Chris Moyles
Stage Announcer (voice)
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Chingy
DJ Robot (uncredited)
- Sean Garnhart Diesel (uncredited)
- Paul Urmson Diesel (uncredited)
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Randy Jackson
Watch #2 (voice) (uncredited)
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James Brown
Diesel (archive footage) (uncredited)
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Frank Welker
Sweeper (voice) (uncredited)