Stanley Tucci Herb Copperbottom (voice)
Ewan McGregor Rodney Copperbottom (voice)
Halle Berry Cappy (voice)
Paul Giamatti Tim the Gate Guard (voice)
Robin Williams Fender (voice)
Jennifer Coolidge Aunt Fanny (voice)
Natasha Lyonne Loretta Geargrinder (voice)
Jim Broadbent Madame Gasket (voice)
Dianne Wiest Mrs. Copperbottom (voice)
James Earl Jones Voice Box at Hardware Store (voice)
Greg Kinnear Ratchet (voice)
Dan Hedaya Mr. Gunk (voice)
Stephen Tobolowsky Bigmouth Executive / Forge (voice)
Jay Leno Fire Hydrant (voice)
Mel Brooks Bigweld (voice)
Amanda Bynes Piper (voice)
Paula Abdul Watch (voice)
Mike Reiss Story Consultant
David Silverman Additional Storyboarding
Alan Rosenberg Jack Hammer (voice)
Harland Williams Lug (voice)
David Lindsay-Abaire Story, Screenplay
Darin De Paul Additional Voices
Drew Carey Crank (voice)
Jansen Panettiere Younger Rodney (voice)
Jon Vitti Story Consultant
Al Roker Mailbox (voice)
Chris Renaud Additional Storyboarding
Babaloo Mandel Screenplay
Adam Van Wyk Additional Storyboarding
Everett Downing Jr. Additional Storyboarding
James Brown Diesel (archive footage) (uncredited)
John Powell Original Music Composer
Chris Moyles Stage Announcer (voice)
Terry Bradshaw Broken Arm Bot (voice)
Will Denton Young Rodney (voice)
Brett Hoffman Story Coordinator, Script Coordinator
Damien Fahey Stage Announcer (voice)
Jim Passon Color Timer
Chris Wedge Director, Wonderbot / Phone Booth (voice)
Karen Disher Storyboard Artist
Ray Iannicelli Additional Voices
David Lucarelli ADR Recordist
Jackie Hoffman Water Cooler (voice)
Gary Burritt Negative Cutter
Lowell Ganz Mr. Gasket (voice), Screenplay
Chris Meledandri Executive Producer
Doug Lefler Additional Storyboarding
Carlos Saldanha Co-Director
William Joyce Production Design, Producer
Sondra James Additional Voices
Dann Fink Additional Voices
Jim Hecht Story Consultant
John Donkin Producer
Galen T. Chu Lead Animator
Natasha Leonnet Digital Color Timer
Peter de Sève Character Designer
Derek Casari ADR Engineer
Jimmy Hayward Story Consultant
Marshall Efron Lamppost / Toilet Bot / Bass Drum / Microphone
Michael Thurmeier Supervising Animator, Visual Effects, Additional Storyboarding
Wyatt Sprague Sound Effects Editor
Randy Jackson Watch #2 (voice) (uncredited)
Bruce Winant Additional Voices / ADR Loop Group
Paul Downs Animation
Steve Martino Art Direction
Sean Garnhart Diesel (uncredited), Sound Designer
Bob Camp Storyboard Artist
Nicholas Renbeck Supervising ADR Editor, Supervising Dialogue Editor
Chingy DJ Robot (uncredited)
Marko Costanzo Foley Artist
Christian Kaplan Casting