Joe Valachi
Charles Bronson
Vito Genovese
Lino Ventura
Tony Bender
Guido Leontini
Donna Petrillo
María Baxa
Salierno
Mario Pilar
Buster
Franco Borelli
Giuseppe 'Joe the Boss' Masseria
Alessandro Sperli
Jane
Natasha Chevelev
Federal Investigator
Anthony Dawson
Buck
Fred Valleca
Steven Ferrigno (uncredited)
John Alarimo
Man of the clan (uncredited)
Calogero Azzaretto
Maria Reina Valachi
Jill Ireland
Irish member of Valachi gang (uncredited)
Joe Don Baker
Winnie (uncredited)
Steve Belloise
Gangster (uncredited)
Angelo Boscariol
Prisoner with Valachi (uncredited)
Nestore Cavaricci
Augie (uncredited)
Giacomo De Michelis
Luciano's Henchman (uncredited)
Bruno Di Luia
Warden (uncredited)
Arny Freeman
Wedding party guest (uncredited)
Alfonso Giganti
Prison Guard (uncredited)
Ron Gilbert
Frank (uncredited)
Frank Gio
Dominick Petrilli, aka "Gap"
Walter Chiari
Commander of Fort Monmouth (uncredited)
Syl Lamont
Donna Petrillo's friend (uncredited)
Imelde Marani
Mary-Lou (uncredited)
Isabelle Marchall
Donald Valachi (uncredited)
Jason McCallum
Jane (uncredited)
Sabine Sun
Self (uncredited)
Robert Trout
(uncredited)
Franco Ressel
Judge (uncredited)
Richard Dunne
Gianni Medici
Salvatore Maranzano
Joseph Wiseman
Ryan, federal agent
Gerald S. O'Loughlin
Gaetano Reina
Amedeo Nazzari
Albert Anastasia
Fausto Tozzi
Letizia Reina
Pupella Maggio
Lucky Luciano
Angelo Infanti
Production Design
Mario Garbuglia
Original Music Composer
Armando Trovajoli
Director of Photography
Aldo Tonti
Makeup Artist
Giannetto De Rossi
Riz Ortolani
Screenplay
Stephen Geller
Novel
Peter Maas
Costume Design
Ann Roth
Producer
Dino De Laurentiis
Director
Terence Young
Dialogue
Massimo De Rita
Executive Producer
Nino Crisman
Dino Maiuri
Sound Engineer
Rocco Roy Mangano
Roger Duchet
Co-Producer
Jerry Ferraro
Editor
Johnny Dwyre
Monica Finzi
Set Decoration
Boris Juraga
Ferdinando Ruffo
Giorgio Desideri