Edward G. Robinson

Theo Wilkins

Rod Steiger

Paul Mason

Joan Collins

Melanie

Eli Wallach

Poncho

Alexander Scourby

Raymond Le May

Michael Dante

Louis Antonizzi

Berry Kroeger

Hugo Baumer

Sebastian Cabot

Casino Director

Marcel Hillaire

Duc di Salins

John Beradino

Chief of Detectives

Bess Flowers

Lady at Casino Party (uncredited)

Ida Augustian

Claire (uncredited)

Frank Baker

Casino Patron (uncredited)

Alex Ball

Guest at Ball (uncredited)

Herman Belmonte

Guest at Ball (uncredited)