Hogarth Hughes (voice)

Eli Marienthal

Annie Hughes (voice)

Jennifer Aniston

Dean McCoppin (voice)

Harry Connick Jr.

The Iron Giant (voice)

Vin Diesel

Foreman Marv Loach / Floyd Turbeaux (voice)

James Gammon

Kent Mansley

Christopher McDonald

Mrs. Lynley Tensedge (voice)

Cloris Leachman

General Rogard (voice)

John Mahoney

Earl Stutz (voice)

M. Emmet Walsh

Additional Voices (voice)

Mary Kay Bergman

Additional Voices (voice)

Jack Angel

Additional Voices (voice)

Ollie Johnston

Additional Voices (voice)

Bob Bergen

Annette Heick

Additional Voices (voice)

Michael Bird

Additional Voices (voice)

Devon Cole Borisoff

Donald Andersen

Additional Voices (voice)

Rodger Bumpass

Additional Voices (voice)

Robert Clotworthy

John Hahn-Petersen

Additional Voices (voice)

Jennifer Darling

Additional Voices (voice)

Zack Eginton

Nis Bank-Mikkelsen

Additional Voices (voice)

Paul Eiding

Peter Aude

Additional Voices (voice)

Bill Farmer

Additional Voices (voice)

Charles Howerton

Additional Voices (voice)

Sherry Lynn

Additional Voices (voice)

Mickie McGowan

Additional Voices (voice)

Ryan O'Donohue

Additional Voices (voice)

Phil Proctor

Additional Voices (voice)

Frank Thomas

Additional Voices (voice)

Patti Tippo

Additional Voices (voice)

Brian Tochi

Firefighter Woman (voice) (uncredited)

Carole Jeghers