Ray Danton as Jack 'Legs' Diamond

Karen Steele as Alice Scott

Elaine Stewart as Monica Drake

Jesse White as Leo 'Butcher' Bremer

Simon Oakland as Lt. Moody

Robert Lowery as Arnold Rothstein

Judson Pratt as Fats Walsh

Warren Oates as Eddie Diamond

Frank De Kova as Syndicate Chairman

Gordon Jones as Police Sgt. Joe Cassidy

Joseph Ruskin as Matt Moran

Dyan Cannon as Dixie

Richard Gardner as Vince Coll

Don Anderson as Bartender (uncredited)

Sammy Armaro as Cab Driver (uncredited)

Herb Armstrong as Cherry Nose Gioe (uncredited)

Nesdon Booth as Pawnbroker / Fence (uncredited)

George Bruggeman as Club Patron (uncredited)

Al Capone as Himself (archive footage) (uncredited)

Dick Cherney as Herman (uncredited)

Paul Comi as Paul (uncredited)

Jann Darlyn as Receptionist (uncredited)

Martin Dean as Teenager (uncredited)

Jack Deery as Club Patron (uncredited)

Jack Del Rio as Syndicate Man at Meeting (uncredited)

Dodie Drake as Cigarette Girl (uncredited)

Jim Drum as Officer (uncredited)

Norman Dupont as Louis - Maitre d'Hotel (uncredited)

Saundra Edwards as Cigar Counter Girl (uncredited)

Bernard Fein as Frenchy La Marr (uncredited)

Rudy Germane as Guard (uncredited)

Mickey Golden as Club Patron (uncredited)

James Gonzalez as Theatre Patron (uncredited)

Robert Haines as Gambler (uncredited)

Ralf Harolde as Doctor (uncredited)

Ed Haskett as Club Patron (uncredited)

Robert "Buzz" Henry as Bodyguard (uncredited)

Bob Herron as Thug (uncredited)

Judd Holdren as Haberdashery Clerk (uncredited)

Roy Jenson as Bodyguard (uncredited)

Dyke Johnson as Bodyguard (uncredited)

Valley Keene as #21 Girl (uncredited)

Kenner G. Kemp as Club Patron (uncredited)

Arthur Kendall as Waxey Gordon (uncredited)

Joseph La Cava as Club Patron (uncredited)

Carey Loftin as Thug (uncredited)

Arthur Lovejoy as Doorman (uncredited)

Ralph Manza as Bookmaker (uncredited)

Joseph Marr as Officer (uncredited)

William Meader as Spectator at Crash Scene (uncredited)

Sid Melton as Little Augie (uncredited)

Frances Mercer as Flo - Brothel Madam (uncredited)

King Mojave as Club Patron (uncredited)

Dorothy Neumann as Woman Outside Movie Theatre (uncredited)

Ron Nyman as Dance Contestant (uncredited)

Monty O'Grady as Club Patron (uncredited)

Anne O'Neal as Dance School Owner (uncredited)

Charles Owens as Gunman (uncredited)

Charles H. Radilak as Waiter (uncredited)

Jean Ransome as Club Patron (uncredited)

Wally Rose as Cab Driver (uncredited)

Clark Ross as Monetti (uncredited)

Jack Santoro as Observer at Scene (uncredited)

Cosmo Sardo as Syndicate Man at Meeting (uncredited)

Bernard Sell as Gambler (uncredited)

Robert 'Buddy' Shaw as (uncredited)

Hazel Shermet as Mrs. Cassidy (uncredited)

Carl Sklover as Croupier (uncredited)

Chet Stratton as Mr. LaTour (uncredited)

Harry Swoger as Big Harry Weston (uncredited)

John Truax as Driver (uncredited)

Edwin Tuttle as Waiter (uncredited)

Jimmy Walker as Himself - Mayor of New York City (archive footage) (uncredited)

Tim Wallace as Bartender (uncredited)

Maurice Wells as Doctor (uncredited)

Lee Whitney as Flashily Dressed Girl (uncredited)

Chalky Williams as Guard (uncredited)

George Taylor as

John Gabriel as Gunman (uncredited)