 Patrick O'NealRichard Cutting | Richard Cutting |
 Joan HackettDominique Laurant | Dominique Laurant |
 John GielgudCurt Valayan | Curt Valayan |
 Herbert LomMatt Wilson | Matt Wilson |
 Eric PortmanNotary | Notary |
 Peter van EyckWalter Green | Walter Green |
 Oskar HomolkaInspector Ruff | Inspector Ruff |
 Leon GreeneThe Big Man | The Big Man |
 Kent SmithMr. Eversley | Mr. Eversley |
 Philip OberBohlen | Bohlen |
 Fifi D'OrsayMrs. Hennie | Mrs. Hennie |
 Éva SzörényiLandlady (as Eva Soreny) | Landlady (as Eva Soreny) |
 Cynthia O'NealFelice Valayan (as Cynthia Baxter) | Felice Valayan (as Cynthia Baxter) |
 Martin MillerPolice Chief (uncredited) | Police Chief (uncredited) |
| CCharles H. RadilakManager (uncredited) | Manager (uncredited) |
| EErik SorensonBellboy (uncredited) | Bellboy (uncredited) |
| BBetty BreslerSecretary (uncredited) | Secretary (uncredited) |
| JJoanne LuddenReceptionist (uncredited) | Receptionist (uncredited) |
| WWalter FriedelSecretary (uncredited) | Secretary (uncredited) |
| KKarl BruckWaiter (uncredited) | Waiter (uncredited) |
 Walter JanovitzWaiter (uncredited) | Waiter (uncredited) |
| AAlbert D'ArnoWaiter (uncredited) | Waiter (uncredited) |
 Ann PrentissHotel Party Girl in Red Dress (uncredited) | Hotel Party Girl in Red Dress (uncredited) |
