Al Capone

Rod Steiger

Al Capone

Fay Spain

Maureen Flannery

James Gregory

Schaefler (narrator)

Martin Balsam

Mac Keeley, reporter

Nehemiah Persoff

Johnny Torrio

Murvyn Vye

George 'Bugs' Moran

Robert Gist

Dion O'Banion

Lewis Charles

Earl Weiss

Joe De Santis

Big Jim Colosimo

Sandy Kenyon

Bones Corelli

Raymond Bailey

Lawyer Brancato

Al Ruscio

Tony Genaro

Louis Quinn

Joe Lorenzo

Ron Soble

John Scalisi

Steve Gravers

Albert Anselmi

Raikin Ben-Ari

Ben Hoffman

Fred Aldrich

Funeral Spectator

Cindy Ames

Nurse

James Bacon

Reporter

Paul Bradley

Benefit Guest

Ralph Brooks

Convict in Yard at Alcatraz

Allen Jaffe

Bodyguard

Clegg Hoyt

Lefty

Paul Bryar

Police Inspector (uncredited)

Larry Chance

Vincent (uncredited)

Dick Cherney

Moran Associate (uncredited)

Mason Curry

Tailor (uncredited)

Russell Custer

Funeral Spectator (uncredited)

Rudy Doucette

Hood (uncredited)

Sol Gorss

Capone Hood at Polling Place (uncredited)

Mauritz Hugo

Hood (uncredited)

Forbes Murray

Pallbearer at Colosimo's Funeral (uncredited)

Dan Riss

Voice of Radio Announcer (uncredited)

Charles Sherlock

Reporter (uncredited)

Fred Sherman

Storekeeper (uncredited)