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Olivia Cooke as Clementine Balfour |
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Helen Mirren as Patricia Highsmith |
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Alden Ehrenreich as Edward Ridgeway |
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Juliet Stevenson as Peggy |
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James Faulkner as Douglas Balfour |
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Brid Brennan as Kathryn Grierson |
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Maddalena Vallecchi Williams as Eleanor |
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Nikolai Selikovsky as Doctor |
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Luca Ferrini as Priest |
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Norbert Ortner as Taxi Driver |
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Alma Leiberg as Housekeeper |
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Enrico Mutti as Elegant italian man |
| Directing | Anton Corbijn | Director |
| Production | Gabrielle Tana | Producer |
| Production | Troy Lum | Producer |
| Production | Andrew Mason | Producer |
| Production | Jim Robison | Producer |
| Production | Kurt Martin | Producer |
| Writing | Joanna Murray-Smith | Screenplay |
| Writing | Joanna Murray-Smith | Theatre Play |
| Art | Dimitri Capuani | Production Design |
| Costume & Make-Up | Gabriella Pescucci | Costume Design |
| Production | Karl Spoerri | Producer |
| Production | Luke Randolph | Producer |
| Production | Andrea Occhipinti | Producer |
| Production | Chris Chard | Executive Producer |
| Production | Meg Clark | Co-Producer |
| Production | Iris Cohen | Associate Producer |
| Production | Michael S. Constable | Co-Producer |
| Production | Marc Furmie | Executive Producer |
| Production | Michael Glassman | Executive Producer |
| Production | Sam Gordon | Co-Producer |
| Production | Phil Hunt | Executive Producer |
| Editing | Andrew Hulme | Editor |
| Production | Nina Gold | Casting |
| Production | Lilia Trapani | Casting |
| Camera | Robbie Ryan | Director of Photography |
