Jennifer Aniston
Annie Hughes (voice)

Harry Connick Jr.
Dean McCoppin (voice)

Vin Diesel
The Iron Giant (voice)

James Gammon
Foreman Marv Loach / Floyd Turbeaux (voice)

Cloris Leachman
Mrs. Lynley Tensedge (voice)

Christopher McDonald
Kent Mansley (voice)

John Mahoney
General Rogard (voice)

Eli Marienthal
Hogarth Hughes (voice)

M. Emmet Walsh
Earl Stutz (voice)

Jack Angel
Additional Voices (voice)

Bob Bergen
Additional Voices (voice)

Mary Kay Bergman
Additional Voices (voice)

Michael Bird
Additional Voices (voice)

Rodger Bumpass
Additional Voices (voice)

Robert Clotworthy
Additional Voices (voice)

Jennifer Darling
Additional Voices (voice)

Paul Eiding
Additional Voices (voice)

Bill Farmer
Additional Voices (voice)

Charles Howerton
Additional Voices (voice)

Ollie Johnston
Additional Voices (voice)

Sherry Lynn
Additional Voices (voice)

Mickie McGowan
Additional Voices (voice)

Phil Proctor
Additional Voices (voice)

Frank Thomas
Additional Voices (voice)

Patti Tippo
Additional Voices (voice)

Brian Tochi
Additional Voices (voice)