James Cagney as C.R. MacNamara

Pamela Tiffin as Scarlett Hazeltine

Horst Buchholz as Otto Ludwig Piffl

Arlene Francis as Phyllis MacNamara

Liselotte Pulver as Fräulein Ingeborg

Howard St. John as Wendell P. Hazeltine

Hanns Lothar as Schlemmer

Leon Askin as Peripetchikoff

Ralf Wolter as Borodenko

Karl Lieffen as Fritz

Hubert von Meyerinck as Count von Droste Schattenburg

Red Buttons as MP Sergeant (uncredited)

Loïs Bolton as Melanie Hazeltine

Peter Capell as Mishkin

Til Kiwe as Reporter

Henning Schlüter as Dr. Bauer

Karl Ludwig Lindt as Zeidlitz

Christine Allen as Cindy MacNamara

John Allen as Tommy MacNamara

John Banner as Krause / Haberdrasher (voice)

Max Buchsbaum as Tailor (uncredited)

Werner Buttler as East German Policeman (uncredited)

Paul Bös as Krause (uncredited)

Josef Coesfeld as Hairdresser (uncredited)

Siegfried Dornbusch as East German Policeman (uncredited)

Gernot Duda as Suitcase Salesman (uncredited)

Otto Friebel as Interrogator (uncredited)

Friedrich Hollaender as Conductor at Grand Hotel (uncredited)

Rose Renée Roth as Berta (uncredited)

Sig Ruman as Count von Droste Schattenburg (voice) (uncredited)

Helmut Schmid as East German Policeman (uncredited)

Jaspar von Oertzen as Haberdasher (uncredited)