Charles Bronson
Joe Valachi
Lino Ventura
Vito Genovese
Jill Ireland
Maria Reina Valachi
Walter Chiari
Dominick Petrilli, aka "Gap"
Joseph Wiseman
Salvatore Maranzano
Gerald S. O'Loughlin
Ryan, federal agent
Amedeo Nazzari
Gaetano Reina
Fausto Tozzi
Albert Anastasia
Pupella Maggio
Letizia Reina
Angelo Infanti
Lucky Luciano
Guido Leontini
Tony Bender
Alessandro Sperli
Giuseppe 'Joe the Boss' Masseria
Anthony Dawson
Federal Investigator
John Alarimo
Steven Ferrigno (uncredited)
Calogero Azzaretto
Man of the clan (uncredited)