Character Name : Self, Walter's twin brother and manager

Original Name : Vincent Cartier

Gender : Male

Character Name : Self

Original Name : Walter Cartier

Gender : Male

Character Name : Self, boxing historian

Original Name : Nat Fleischer

Gender : Male

Character Name : Self, Walter's opponent

Original Name : Bobby James

Gender : Male

Character Name : Self, female fan in crowd (uncredited)

Original Name : Judy Singer

Gender : Male

Character Name : Self (man at ringside with camera) (uncredited)

Original Name : Stanley Kubrick

Gender : Male

Character Name : Self

Original Name : Alexander Singer

Gender : Male

Character Name : Narrator

Original Name : Douglas Edwards

Gender : Male