The Greatest (1977)

The Greatest is a 1977 film about the life of boxer Muhammad Ali, in which Ali plays himself. It was directed by Tom Gries and Monte Hellman. The film follows Ali's life from the 1960 Olympics to his regaining the heavyweight crown from George Foreman in their famous "Rumble in the Jungle" fight in 1974. The footage of the boxing matches themselves are largely the actual footage from the time involved.

More at Wikipedia.

Cast:

• Arthur Adams
• Muhammad Ali
• Nai Bonet
• Ernest Borgnine
• George Carro
• David Clennon
• George Cooper
• Toni Crabtree
• Don Dunphy
• Sally Gries
• Richard Gullage
• Ray Holland
• Skip Homeier
• Paul Mantee
• Alberto Martin
• Ben Medina
• Dorothy Meyer
• Muhammad Ali, Ernest Borgnine, James Earl Jones, Robert Duvall
• Stack Pierce
• Robert Duvall is uncredited
• Richard Venture
• Ernie Wheelwright
• William Youngblood