Cassius Clay / Muhammad Ali
Marcellus Clay
Malcolm X
Drew 'Bundini' Brown
Angelo Dundee
Elijah Muhammad
Rudy Clay / Rahaman
Howard Cosell
(as Yvonna Kopacz)
Young Cassius
Ferdie Pacheco
Young Rudy
Sonny Liston
Belinda
Hardy
Mae
Ernie Terrell
Gloria
Sergeant
Leslie
Pat Rogers
Reporter #1
Reporter #2 (as James K. Ward)
Reporter #3
Judge
Self
Minister Shabazz (uncredited)
Cassius Clay, Sr. (uncredited)