 | Alain Delon als Tom Ripley |
 | Marie Laforêt als Marge Duval |
 | Maurice Ronet als Philippe Greenleaf |
 | Erno Crisa als Inspector Riccordi |
 | Frank Latimore als O'Brien |
 | Billy Kearns als Freddy Miles |
 | Ave Ninchi als Signora Gianna |
 | Viviane Chantel als The Belgian Lady |
 | Nerio Bernardi als Agency Director |
 | Barbel Fanger als Mr. Greenleaf |
| Lily Romanelli als Housekeeper |
| Nicolas Petrov als Boris |
 | Elvira Popescu als Mrs. Popova |
 | Romy Schneider als Freddy's Companion (uncredited) |
 | Paul Müller als Blind Man (uncredited) |
 | René Clément als The clumsy waiter (uncredited) |
| Jacqueline Decaë als Ingrid (uncredited) |
| Leonello Zanchi als Police inspector (uncredited) |
| Walter Grant als Purchaser of the yacht (uncredited) |
 | Nino Vingelli als (uncredited) |
| Henri Decaë | Director of Photography |
| Robert Hakim | Producer |
| Paul Gégauff | Screenplay |
| Nino Rota | Original Music Composer |
| René Clément | Screenplay |
| Françoise Javet | Editor |
| Raymond Hakim | Producer |
| René Clément | Director |
| Paul Bertrand | Production Design |
| Jacques Carrère | Sound Mixer |
| Jean-Claude Marchetti | Sound |
| Jean Rabier | Camera Operator |
| Piero Cocco | Production Manager |
| Marcel Corvaisier | Boom Operator |
| Jean-Paul Schwartz | First Assistant Camera |
| Louis Bonnemaison | Makeup Artist |
| Pierre Zimmer | Assistant Director |
| Jean Guélis | Choreographer |
| Alberto Cardone | Assistant Director |
| Patricia Highsmith | Novel |
| Jacques Météhen | Conductor |
| Yvette Vérité | Script Supervisor |
| Bruno Avesani | Assistant Art Director |
| Eugène Roman | Assistant Art Director |
| Maurice Rémy | Sound Recordist |
| Maurice Binder | Title Designer |
| André Bouladoux | Key Grip |
