Reparto (por orden de créditos)
Muhammad Ali
Self
Sylvester Stallone
George Foreman
George Chuvalo
Henry Cooper
Angelo Dundee
Ernie Terrell
Earnie Shavers
Gene Kilroy
Jerry Izenberg
Hugh McIlvanney
Michael Marley
Morton Sharnik
Wilbert McClure
Bob Goodman
Dave Kindred