Mary Ellis
— Melitza Hjos
Otto Kruger
— King Stefan
Victor Jory
— Baron Lyadeff
Barry MacKay
— Anthony Allan
Trefor Jones
— Lorenti
Maire O'Neill
— Phoebe
Anthony Holles
— Maestro
Charles Carson
— Otto
Felix Aylmer
— Diplomat
Finlay Currie
— Angus MacKintosh
Jeanne Carpenter
— Undetermined Role (uncredited)
Raymond Lovell
— Ship's Officer (uncredited)