Richard Greene
— Count Alexei Orloff
Valentina Cortese
— Elizabeth, Princess Tarakanova
Binnie Barnes
— Catherine - Empress of Russia
Greta Gynt
— Countess Loradona Camponiello
Charles Goldner
— General Korsakov
Walter Rilla
— Prince Radziwill
Hugh French
— Captain Sergei Nikolsky
Dennis Vance
— Vasska, Orloff's Aide
William Tubbs
— Boris
Dino Galvani
— Russian Ambassador
Ewan Roberts
— Ship's Doctor