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

María Baxa

Donna Petrillo

Franco Borelli

Buster

Alessandro Sperli

Giuseppe 'Joe the Boss' Masseria

Anthony Dawson

Federal Investigator

Fred Valleca

Buck

John Alarimo

Steven Ferrigno (uncredited)

Calogero Azzaretto

Man of the clan (uncredited)

Joe Don Baker

Irish member of Valachi gang (uncredited)

Angelo Boscariol

Gangster (uncredited)

Nestore Cavaricci

Prisoner with Valachi (uncredited)

Bruno Di Luia

Luciano's Henchman (uncredited)

Arny Freeman

Warden (uncredited)

Alfonso Giganti

Wedding party guest (uncredited)

Ron Gilbert

Prison Guard (uncredited)

Frank Gio

Frank (uncredited)

Imelde Marani

Donna Petrillo's friend (uncredited)

Isabelle Marchall

Mary-Lou (uncredited)

Sabine Sun

Jane (uncredited)

Robert Trout

Self (uncredited)

Franco Ressel

(uncredited)

Richard Dunne

Judge (uncredited)