| Keira Knightley (Cecilia Tallis) |
| James McAvoy (Robbie Turner) |
| Saoirse Ronan (Briony Tallis à 13 ans) |
| Romola Garai (Briony à 18 ans) |
| Brenda Blethyn (Grace Turner) |
| Vanessa Redgrave (Briony âgée) |
| Juno Temple (Lola Quincey) |
| Benedict Cumberbatch (Paul Marshall) |
| Ailidh Mackay |
| Julia West (Betty) |
| Harriet Walter (Emily Tallis) |
| Felix von Simson (Pierrot Quincey) |
| Charlie von Simson (Jackson Quincey) |
| Alfie Allen (Danny Hardman) |
| Patrick Kennedy (Leon Tallis) |