Freddie Highmore ....Astro Boy
Nicolas Cage ....Dr. Tenma
Bill Nighy ....Dr. Elefun
Donald Sutherland ....General Stone
Eugene Levy ....Orrin
Nathan Lane ....Ham Egg
Madeline Carroll ....Widget / Grace
Sterling Beaumon ....Sludge / Sam
Moises Arias ....Zane
Victor Bonavida ....Sam
Charlize Theron ....'Our Friends' Narrator
Samuel L. Jackson ....Zog
Tony Matthews ....Cora's Dad
Ryan Stiles ....Mr. Moustachio / Burning Robot
David Alan Grier ....Mr. Squirt / Math Cowboy / Boxer Robot
Alan Tudyk ....Mr. Squeegee / Scrapheap Head / Stinger Two
Newell Alexander ....General Heckler
Bob Logan ....Stinger One
Dee Bradley Baker ....Trashcan
David Bowers ....Mike the Fridge
Elle Fanning ....Grace
Nicole Fletcher ....Oh No! Kid
David Feiss ....Cowboy Robot
Nicholas Guest ....French Waiter Robot
Max Burkholder ....Billy
Steve Alterman ....Press Secretary
Rif Hutton ....Metro City Sergeant
Madeleine Russell ....Metro City Girl
and
Kristen Bell
Matt Lucas
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