Freddie Highmore

Character: Astro / Toby (voice)

Kristen Bell

Character: Cora (voice)

Nathan Lane

Character: Hamegg (voice)

Eugene Levy

Character: Orrin (voice)

Matt Lucas

Character: Sparx (voice)

Bill Nighy

Character: Dr. Elefun / Robotsky (voice)

Donald Sutherland

Character: President Stone (voice)

Charlize Theron

Character: "Our Friends" Narrator (voice)

Nicolas Cage

Character: Dr. Tenma (voice)

Madeline Carroll

Character: Widget (voice)

Sterling Beaumon

Character: Sludge (voice)

Samuel L. Jackson

Character: Zog (voice)

David Alan Grier

Character: Mr. Squirt / Math Cowboy / Boxer Robot (voice)

Alan Tudyk

Character: Mr. Squeegee / Scrapheap Head / Stinger Two (voice)

Newell Alexander

Character: General Heckler (voice)

Elle Fanning

Character: Grace (voice)

Pilar Flynn

Character: Cora's Mom (voice)

Dee Bradley Baker

Character: Trashcan (voice)

Moisés Arias

Character: Zane (voice)

Ryan Stiles

Character: Mr. Moustachio / Burning Robot (voice)

David Bowers

Character: Mike the Fridge (voice)

Sofia Bowers

Character: The Little Stinker (voice)

Nicole Fletcher

Character: "Oh No!" Kid (voice)

Maryann Garger

Character: Dr. Pigknuckle / Newscaster (voice)

Tiffany Hillkurtz

Character: Bride to Be (voice)

David Feiss

Character: Cowboy Robot (voice)

Nicholas Guest

Character: French Waiter Robot (voice)

Max Burkholder

Character: Billy (voice)

Victor Bonavida

Character: Sam (voice)

Steve Alterman

Character: Press Secretary (voice)

Rif Hutton

Character: Metro City Sergeant (voice)

Madeleine Russell

Character: Metro City Girl (voice)

Tony Matthews

Character: Cora's Dad (voice)