Al Capone
Ben Gazzara
Johnny Torrio
Harry Guardino
Anton J. Cermak
Royal Dano
Charles Fischetti
Joe De Nicola
Angelo Genna
Angelo Grisanti
Jake Guzik
Peter Maloney
Joe Pryor
Dick Miller
Bugs Moran
Robert Phillips
Pete Gusenberg
Martin Kove
Giuseppe Aiello
Mario Gallo
William H. Thompson
George Milan
Joseph Stenson
Russ Marin
Frank Nitti
Sylvester Stallone
Antonio Lombardo
Tony Giorgio
Tony Amatto
John Martino
Frank Loesch
Bert Conway
William Cooper
Don Pulford
Mrs. Atkins
Pamela Toll
Miss Detwiller
Eugenia Stewart
N.Y. Cop #1
Don McGovern
N.Y. Cop #2
Redmond Gleeson
N.Y. Police Lt.
John Finnegan
Samuel Ettelson
Laurence Hagen
Iris Crawford
Susan Blakely
Sam Volenta
Tom Cook
Solly
Vincent Barbi
Mrs. Torrio
Tina Scala
Thomas Bronk
James V. Christy
Adam Heyer
Jack Ackerman
Judge J.H. Wilkerson
Ralph James
Waiter
Carmen Filpi
John May
Jim Galante
Warden J. Johnston
John Howard
Joe Kepka
Beach Dickerson
Frankie Yale
John Cassavetes
Maitre d'
John C. Broderick
Senator
Chuck Traynor
Prison Doctor
James R. Sweeney
Torrio's Doctor
George Engelson
Female Reporter
Deborah Klose
First Reporter
John Favorite
Second Reporter
John Armond
Pool Hall Owner
Jack O'Leary
Frank Gusenberg
Ben Marino
Mob Soldier (uncredited)
Vincent Di Paolo
Big Jim Colosimo
Frank Campanella
Dion O'Banion
John Orchard
Jack McGurn
Carmen Argenziano
Robert E. Crowe
George Chandler
Hymie Weiss
John Davis Chandler
Assistant Director
Eugene Mazzola
Producer
Roger Corman
Assistant Editor
Barbara Meyer
Stunt Coordinator
Charlie Picerni
Director
Steve Carver
Writer
Howard Browne
Music
David Grisman
Set Decoration
Ned Parsons
Makeup Artist
Maurice Stein
Property Master
V.R. Bud Shelton
Art Direction
Ward Preston
Steve Ferry
Special Effects
Roger George
Editor
Richard C. Meyer
Production Supervisor
Peter Cornberg
Camera Operator
Héctor R. Figueroa
Script Supervisor
Jann Carver
Hairstylist
Patricia Miller
Director of Photography
Vilis Lapenieks
Stephen R. Ferry
Teri Schwartz
Location Coordinator
Jerome L. Posner
Associate Producer
Sound Mixer
Robert Gravenor
Sound Effects Designer
Gene Corso
Assistant Sound Editor
Samuel C. Crutcher
Boom Operator
Lowell Brown
Lighting Director
Lee Heckler
First Assistant Camera
Robert Edesa