Cast 30

1. 

   Anthony Quinn

   Lewis 'Mountain' Rivera

2. 

   Jackie Gleason

   Maish Rennick

3. 

   Mickey Rooney

   Army

4. 

   Julie Harris

   Grace Miller

5. 

   Stanley Adams

   Perelli (as Stan Adams)

6. Madame Spivy

   Ma Greeny

7. 

   Val Avery

   Young fighter's promoter

8. 

   Herbie Faye

   Charlie, the Bartender

9. 

   Jack Dempsey

   Himself

10. 

    Muhammad Ali

    Himself (as Cassius Clay)

11. 

    Lou Gilbert

    Dr. Gilbert

12. 

    Michael Conrad

    Ma Greeny's Thug

13. 

    Rory Calhoun

    Himself

14. Barney Ross

15. Willie Pep

16. Steve Belloise

    Hotel Desk Clerk

17. Abe Simon

18. Stan Ross

19. J.J. Ballargeon

20. 

    Paolo Rosi

21. Alex Miteff

22. Gus Lesnevich

23. 

    Al Bain

    Police Officer (uncredited)

24. William Calhoun

    Self - Rivera's wrestling opponent (uncredited)

25. Nancy Cushman

    Woman on Elevator (uncredited)

26. Sig Frohlich

    Diner Patron (uncredited)

27. John Indrisano

    Barfly Watching TV (uncredited)

28. Arthur M. Mercante

    Referee (uncredited)

29. 

    Angelo Rossitto

    Midget Wrestler Outside Wrestling Ring (uncredited)

30. 

    David Susskind

    Self - Trailor Narrator (uncredited)

Crew 12