A young man travels from New York to Switzerland to try to persuade acclaimed thriller writer Patricia Highsmith to write one final installment of her Tom Ripley series, with his efforts gradually turning more sinister.
| Actor | Role |
|---|---|
 Helen MirrenPatricia Highsmith | Patricia Highsmith |
 Alden EhrenreichEdward Ridgeway | Edward Ridgeway |
 Olivia CookeClementine Balfour | Clementine Balfour |
 Juliet StevensonPeggy | Peggy |
 James FaulknerDouglas Balfour | Douglas Balfour |
 Brid BrennanKathryn Grierson | Kathryn Grierson |
| MMaddalena Vallecchi WilliamsEleanor | Eleanor |
 Nikolai SelikovskyDoctor | Doctor |
| LLuca FerriniPriest | Priest |
 Norbert OrtnerTaxi Driver | Taxi Driver |
 Alma LeibergHousekeeper | Housekeeper |
 Enrico MuttiElegant italian man | Elegant italian man |
| EEduardo Xavier De SilvaBradley Appleby | Bradley Appleby |
 Giulia LinTilly | Tilly |
| OOrlando AnselmettiWaiter (Roman Bar) | Waiter (Roman Bar) |
| CCarlo Giuseppe InsamElderly Man | Elderly Man |
| AAdam Kay NixonHarry Apperton-Roy | Harry Apperton-Roy |
| LLorenzo MelliniWaiter (Baur Au Lac Hotel) | Waiter (Baur Au Lac Hotel) |
| NNicola GarofaloMaître D' | Maître D' |
| MMark ApplebyVoice of Bradley Appleby | Voice of Bradley Appleby |