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)