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

Allan Cavan as

Davison Clark as

Alexis Davidoff as

William B. Davidson as

Walter Downing as

Geraldine Dvorak as

Adolph Faylauer as

Joseph W. Girard as

Al Hart as

Ramsay Hill as

George Irving as

Ethan Laidlaw as

Tom Lucas as

Wilfred Lucas as

Ruth Mayhew as

Harold Nelson as

Paul Panzer as

Bill Powell as Hotel Manager (uncredited)

Buddy Roosevelt as

Scott Seaton as

Harry Semels as