| Peter Joshua / Carson Dyle / Alexander Dyle / Adam Canfield / Brian Cruikshank | 加里·格兰特
 | |
| Regina Lampert | 奥黛丽·赫本
 | |
| Hamilton Bartholemew | 沃尔特·马修
 | |
| Tex Panthollow | 詹姆斯·柯本
 | |
| Herman Scobie | 乔治·肯尼迪
 | |
| Man in Elevator (voice) (uncredited) | 斯坦利·多南
 | |
| Sylvie Gaudet | Dominique Minot | |
| Leopold W. Gideon | Ned Glass
 | |
| Insp. Edouard Grandpierre | Jacques Marin | |
| Mr. Felix - Stamp Dealer | Paul Bonifas | |
| Jean-Louis Gaudet | Thomas Chelimsky | |
| Hamilton Bartholomew (uncredited) | Colin Drake | |
| German Tourist (uncredited) | Clément Harari | |
| Master of Ceremonies at Les Black Sheep Club (uncredited) | Monte Landis | |
| Hotel Receptionnist (uncredited) | Bernard Musson | |
| Ice cream salesman (uncredited) | Jacques Préboist | |
| Man in Elevator / Voice of Marine (uncredited) | Peter Stone
 | |
| Subway passenger (uncredited) | Marc Arian | |
| Maid (uncredited) | Claudine Berg | |
| Taxi Driver (uncredited) | Marcel Bernier | |
| Man in stamp market (uncredited) | Georges Billy | |
| Man in stamp market (uncredited) | Albert Daumergue | |
| Taxi Driver (uncredited) | Raoul Delfosse | |
