Reparto (por orden de créditos)
Muhammad Ali
Self
Joe Frazier
Johnny Addie
Self - Ring Announcer
Woody Allen
Self - Audience Member
Burt Bacharach
Manuel Benítez 'El Cordobés'
Michael Caine
Dick Cavett
Bill Cosby
Howard Cosell
Sammy Davis Jr.
Miles Davis
Jack Dempsey
Angelo Dundee
Self - Trainer
Don Dunphy
Self - Commentator
David Frost
Eddie Futch
Hugh Hefner
Danny Kaye
Diane Keaton
Ethel Kennedy
Burt Lancaster
Arthur Mercante
Self - Referee
Edgar D. Mitchell
Archie Moore
LeRoy Neiman
Sugar Ray Robinson
Stuart Roosa
Diana Ross
Alan Shepard
Frank Sinatra
Self - Photographer
Barbra Streisand
Ed Sullivan
John Tunney
Andy Williams