I, Mobster

Steve Cochran Joe Sante

Lita Milan Teresa Porter

Robert Strauss Black Frankie Udino

Celia Lovsky Mrs. Sante

Lili St. Cyr Herself, Lili St. Cyr

John Brinkley Ernie Porter

Grant Withers Paul Moran

Yvette Vickers The Blonde

Frank Gerstle District Attorney

Robert Shayne Senator

Wally Cassell Cherry Nose Sirago (adult)

Jeri Southern Singer

Eddie Baker Labor Union Boss (uncredited)

Benjie Bancroft Police Officer (uncredited)

Stephen Chase Mr. Stephens (uncredited)

George Cisar Cab Driver (uncredited)

John Dennis Murder Inc. Man (uncredited)

Charles Evans Committee Chairman (uncredited)

Thomas Browne Henry Udino's Attorney (uncredited)

Michael Jeffers Syndicate Member (uncredited)