Alan Marshal
— Jeffrey Clavering
Tala Birell
— Sandra Kamarov
Mady Correll
— Princess Stephanie
C. Henry Gordon
— Nikolai Kamarov
Herbert Mundin
— Sergeant Alfred M. Higgs
Gerald Oliver Smith
— Bassett
Ivan F. Simpson
— Michael (as Ivan Simpson)
Elsa Buchanan
— Sophia
Dwight Frye
— Alex
Leonard Willey
— Sir Herbert Donbridge
Ian Maclaren
— Sir Joshua Longstreet
Egon Brecher
— Kirman
Frank Puglia
— Signor Bramucci
Sidney Bracey
— Kamarov's Butler
Lawrence Grant
— Foreign Diplomat
Keith Hitchcock
— Secondary Supporting Role
Paul Sutton
— Chauffeur
Wilhelm von Brincken
— Foreign Diplomat