Anthony Quinn

~ as ~

Lewis 'Mountain' Rivera

Jackie Gleason

~ as ~

Maish Rennick

Mickey Rooney

~ as ~

Army

Julie Harris

~ as ~

Grace Miller

Stanley Adams

~ as ~

Perelli (as Stan Adams)

Madame Spivy

~ as ~

Ma Greeny

Val Avery

~ as ~

Young fighter's promoter

Herbie Faye

~ as ~

Charlie, the Bartender

Jack Dempsey

~ as ~

Himself

Muhammad Ali

~ as ~

Himself (as Cassius Clay)