 | Judi Dench als Joan Elizabeth Stanley |
 | Sophie Cookson als Young Joan Elizabeth Stanley |
 | Tom Hughes als Leo Galich |
 | Tereza Srbova als Sonya Galich |
 | Stephen Campbell Moore als Max |
 | Ben Miles als Nick |
 | Nina Sosanya als Ms. Hart |
 | Laurence Spellman als Mr Adams |
 | Nicola Sloane als Joan's Neighbor |
 | Freddie Gaminara als William |
| Raj Swamy als Kharak |
 | Adrian Wheeler als Heckler |
| Lulu Meissner als Waitress |
 | Phill Langhorne als Uniformed Policeman |
| Mike Sykes als Security Guard |
 | Ed Birch als Donald |
 | Debbie Chazen als Karen |
 | Robin Soans als Clement Attlee |
 | Raymond Coulthard als James Chadwick |
 | Simon Ludders als Naval Captain |
 | Stuart Milligan als Taylor Scott |
 | Stephen Boxer als Peter Kierl |
| Lily Delderfield als Katya |
| Jessica Delderfield als Katya |
 | Ciarán Owens als Detective Hughes |
| Kevin Fuller als Detective Phillips |
| Hasan Dixon als Police Constable |
 | Richard Teverson als Detective Watson |
 | Steven Hillman als Prison Guard |
| Irfan Shamji als Journalist |
| Trevor Nunn | Director |
| Zac Nicholson | Director of Photography |
| David Parfitt | Producer |
| James Atherton | Executive Producer |
| Lindsay Shapero | Screenplay |
| Tim Haslam | Executive Producer |
| George Fenton | Original Music Composer |
| Kristina Hetherington | Editor |
| Cristina Casali | Production Design |
| Hugo Grumbar | Executive Producer |
| Alice Dawson | Co-Producer |
| Jennie Rooney | Novel |
| Andy Long | Gaffer |
| Jan Pace | Executive Producer |
| Cleone Clarke | Associate Producer |
| Beth Timbrell | Production Manager |
| Will Whale | Sound Mixer |
| Frances Bennett | Graphic Designer |
| Chris Reynolds | Special Effects Supervisor |
| Sue Harding | Foley Artist |
| Karl Sydow | Executive Producer |
| Kelly E. Ashton | Executive Producer |
| Craig Irving | Sound Re-Recording Mixer |
| Sallie Jaye | Makeup & Hair |
| Charlotte Walter | Costume Designer |
| Cordelia Hardy | First Assistant Director |
| Nick Adams | Supervising Sound Editor |
| Priscilla John | Casting |
| Nick Wall | Still Photographer |
| Mark Knapton | Visual Effects Supervisor |
| Tanya Bowd | Set Decoration |
| Orla Maxwell | Casting |
| Kim Armitage | Script Supervisor |
| Ivan Mactaggart | Co-Producer |
| Parisa Taghizadeh | Still Photographer |
| Vanessa Taylor | Colorist |
| Dario Swade | Foley Editor |
| Zygi Kamasa | Executive Producer |
| Sion Clarke | Supervising Art Director |
| Max Walsh | Sound Re-Recording Mixer |
| Sam Smart | Makeup & Hair |
| Abbie Bellwood | Assistant Set Decoration |
| Russell Daly | Construction Manager |
| Douglas Ingram | Storyboard Artist |
| Charlotte Meakin | Assistant Art Director |
| Steve Register | Property Master |
| Polly Stevens | Assistant Art Director |
| Nick Baldock | ADR Mixer |
| Chus Lucas | Stunt Double |
| Jo McLaren | Stunt Coordinator |
| Anthony Skrimshire | Stunts |
| Wailoon Chung | Electrician |
| Alex Coverley | Key Grip |
| Barney Davis | Steadicam Operator |
| Luke Redgrave | Camera Operator |
| Paul Sallent | Electrician |
| Andreya Lynham | Casting Associate |
| Mariem Bey | Wardrobe Supervisor |
| Carmen Cristea | Wardrobe Master |
| Hannah Warren | Assistant Costume Designer |
| Malcolm Crowe | Assistant Editor |
| Thora Woodward | First Assistant Editor |
| Samuel Pegg | Music Editor |
| Graham Sutton | Music Editor |
| Elfyn Wyn Jones | Production Accountant |
| Amelia Southgate | Production Coordinator |
