Anthony Quinn (47)

Lewis 'Mountain' Rivera

Jackie Gleason (46)

Maish Rennick

Mickey Rooney (42)

Army

Julie Harris (36)

Grace Miller

Stanley Adams (47)

Perelli (as Stan Adams)

Madame Spivy (56)

Ma Greeny

Val Avery (38)

Young fighter's promoter

Herbie Faye (63)

Charlie, the Bartender

Jack Dempsey (67)

Himself

Muhammad Ali (20)

Himself (as Cassius Clay)

Lou Gilbert (53)

Dr. Gilbert

Michael Conrad (37)

Ma Greeny's Thug

Rory Calhoun (40)

Himself

Barney Ross (52)

Willie Pep (40)

Steve Belloise (43)

Hotel Desk Clerk

Abe Simon

Stan Ross (36)

J.J. Ballargeon

Paolo Rosi

Alex Miteff

Gus Lesnevich

Al Bain (54)

Police Officer (uncredited)

William Calhoun (28)

Self - Rivera's wrestling opponent (uncredited)

Nancy Cushman (49)

Woman on Elevator (uncredited)

Sig Frohlich (52)

Diner Patron (uncredited)

John Indrisano (56)

Barfly Watching TV (uncredited)

Arthur M. Mercante (42)

Referee (uncredited)

Angelo Rossitto (54)

Midget Wrestler Outside Wrestling Ring (uncredited)

David Susskind (41)

Self - Trailor Narrator (uncredited)