Muhammad Ali

Cassius Clay / Muhammad Ali

Ernest Borgnine

Angelo Dundee

John Marley

Dr. Ferdie Pacheco

Lloyd Haynes

Herbert Muhammad

Lucille Benson

Mrs. Fairlie

Malachi Throne

Payton Jory

Teddy Wilson

Joe The Gardener

Annazette Chase

Belinda Ali

Drew Bundini Brown

Himself

Robert Duvall

Bill McDonald

David Huddleston

Cruikshank

Ben Johnson

Hollis

James Earl Jones

Malcolm X

Dina Merrill

Velvet Green

Roger E. Mosley

Sonny Liston

Paul Winfield

Draft Lawyer

Howard Bingham

Howard Bingham

Richard Venture

Colonel

Stack Pierce

Rahaman

Paul Mantee

Carrara

Skip Homeier

Major

David Clennon

Captain

James Gammon

Mr. Harry

Don Dunphy

Commentator

Walter Olkewicz

Reporter

Roy Firestone

TV Reporter (uncredited)