Tony Curtis as Louis 'Lepke' Buchalter

Anjanette Comer as Bernice Meyer

Michael Callan as Robert Kane

Warren Berlinger as Gurrah Shapiro

Gianni Russo as Albert Anastasia

Milton Berle as Mr. Meyer

Vic Tayback as Charles 'Lucky' Luciano

Mary Charlotte Wilcox as Marion

Jack Ackerman as Little Augie

Louis Guss as Max Rubin

Lillian Adams as Mama Meyer

Albert Cole as Gross

Zitto Kazann as Abe 'Kid Twist' Reles

Simmy Bow as Albert Tannenbaum

Russ Grieve as Judge

Clement von Franckenstein as Bugsy Siegel

Vaughn Meader as Walter Winchell

Johnny Silver as Schwartz

J.S. Johnson as Mendy Weiss

John Durren as Dutch Schultz

Barry Miller as Young Lepke

Jon Ian Jacobs as Big Hesh

Matt Greene as Skinny

Richard C. Adams as Thomas E. Dewey

Edwin Fuller as J. Edgar Hoover

Chuck Hayward as Doorman

Wesley Lau as First Detective

T.J. Castronovo as Policeman