When a string of jewel robberies hits the French Riviera, suspicion falls on retired thief John “The Cat” Robie. To clear his name, he sets out to trap the copycat himself—entangling a wealthy widow and her beguiling daughter in a seductive game of pursuit, deception, and desire.
| John Robie | Cary Grant |
| Frances Stevens | Grace Kelly |
| Jessie Stevens | Jessie Royce Landis |
| H. H. Hughson | John Williams |
| Bertani | Charles Vanel |
| Danielle Foussard | Brigitte Auber |
| Foussard | Jean Martinelli |
| Germaine | Georgette Anys |
| Commissaire Lepic (uncredited) | René Blancard |
| Big Man in Kitchen (uncredited) | William 'Wee Willie' Davis |
| Masquerade Party Guest (uncredited) | Bess Flowers |
| Casino Patron (uncredited) | Bernard Sell |
| Detective (uncredited) | Charles Sherlock |
| Jewelry Clerk (uncredited) | Philip Van Zandt |
| Man Sitting Next to John Robie on Bus (uncredited) | Alfred Hitchcock |
| Bertani Employee (uncredited) | Roland Lesaffre |
| Party Guest (uncredited) | George Boyce |
| Detective at the Costume Ball (uncredited) | John Alderson |
| Detective (uncredited) | Alberto Morin |
| Croupier (uncredited) | Manuel París |
| Elegant French Woman / Additional Voices (uncredited) | Gladys Holland |
| Party Guest (uncredited) | Fred Kelsey |
| Frenchman (uncredited) | Barry Norton |
| Croupier (uncredited) | Louis Mercier |
| Casino Patron (uncredited) | Oliver Cross |
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