Muhammad Ali
Cassius Clay / Muhammad Ali
Ernest Borgnine
Angelo Dundee
John Marley
Dr. Ferdie Pacheco
Lloyd Haynes
Herbert Muhammad
Malachi Throne
Payton Jory
Lucille Benson
Mrs. Fairlie
Teddy Wilson
Joe The Gardener
Annazette Chase
Belinda Ali
Mira Waters
Ruby Sanderson
Chip McAllister
Cassius Clay aged 18
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
Sally Bondi
Bess
Richard Gullage
Commission Doctor
Arthur Adams
Cassius Clay Sr.
Dorothy Meyer
Odessa Clay
Rahman Ali
Rahman Ali
Howard Bingham
Howard Bingham
Richard Venture
Colonel
Stack Pierce
Rahaman
W. Youngblood Muhammad
W. Youngblood Muhammad
Ven Medina
Ronnie
Paul Mantee
Carrara
Skip Homeier
Major
Lloyd Wells
Lloyd Wells
George Garro
Mr.Curtis
David Clennon
Captain
Ernie Wheelwright
Bossman Jones
Pat Patterson
Pat Patterson
George Cooper
Lawyer
James Gammon
Mr. Harry
Gene Kilroy
Gene Kilroy
Toni Crabtree
Hooker
Sally Gries
Sponsor's Wife
Elizabeth Marshall
Sponsor's Wife
Don Dunphy
Commentator
Fernand A. Larrieu Jr.
Grocer
Nai Bonet
Suzie Gomez
Harold Conrad
Harold Conrad
Alberto Martín
Doctor
Walter Olkewicz
Reporter
Roy Firestone
TV Reporter (uncredited)