Richard Greene as Count Alexei Orloff

Valentina Cortese as Elizabeth, Princess Tarakanova

Binnie Barnes as Catherine - Empress of Russia

Greta Gynt as Countess Loradona Camponiello

Charles Goldner as General Korsakov

Walter Rilla as Prince Radziwill

Hugh French as Captain Sergei Nikolsky

Dennis Vance as Vasska, Orloff's Aide

William Tubbs as Boris

Dino Galvani as Russian Ambassador

Ewan Roberts as Ship's Doctor