Marlene Dietrich

as Magda / X27

Victor McLaglen

as Colonel Kranau

Gustav von Seyffertitz

as Austrian Secret Service Chief

Warner Oland

as Colonel von Hindau

Lew Cody

as Colonel Kovrin

Barry Norton

as Young Lieutenant - Firing Squad

Max Barwyn

as Colonel Kranau's Aide

B.F. Blinn

as Gambler with Glasses