 | James Purefoy als Thomas Marshall |
 | Kate Mara als Lady Isabel |
 | Jason Flemyng als Becket |
 | Paul Giamatti als King John |
 | Brian Cox als Albany |
 | Derek Jacobi als Cornhill |
 | Charles Dance als Stephen Langton, Archbishop of Canterbury |
 | Aneurin Barnard als Guy |
 | Jamie Foreman als Coteral |
 | Mackenzie Crook als Marks |
 | Rhys Parry Jones als Wulfstan |
 | Vladimir Kulich als Tiberius |
 | David Melville als Baron Darnay |
 | Annabelle Apsion als Maddy |
 | Steffan Rhodri als Cooper |
| Daniel O'Meara als Phipps |
 | Bree Condon als Agnes |
 | Guy Siner als Oaks |
| Marcus Hoyland als Abbott Marcus |
| John Pierce Jones als Cook |
| Jeff Jones als Head Clerk |
| Ceri Mears als Blacksmith |
 | Kenneth Collard als Sapper Captain |
| Wyn Bowen Harries als Baron |
| Dewi Williams als Baron |
| John Weldon als Castle Darney Sentry |
| Laura Sibbick als Castle Servant Girl |
| Edward Manning als Mercenary |
 | Simon Nader als Hungarian Mercenaries (voice) |
| Steve Purbrick als Tavern Landlord |
| Peter Bartfay als Hungarian Mercenaries (voice) (uncredited) |
| Dan Burman als Mercenary Scout (uncredited) |
| Ian M. Court als Priest (uncredited) |
| David Harkus als Young Soldier (uncredited) |
| Gerald Royston Horler als Hungarian Warrior (uncredited) |
| Rhys Horler als Hungarian Warrior (uncredited) |
| Rhi Louise als Topless Wench (uncredited) |
| Stuart Mager als Garrison Guard (uncredited) |
| Christian Morgan als Wounded Guard (uncredited) |
| Stevie Raine als Mercenary Fight Performer (uncredited) |
| Carlton Venn als King's Aid 2 (uncredited) |
| Jonathan English | Director |
| Jonathan English | Story |
| Erick Kastel | Screenplay |
| Rick Benattar | Producer |
| David Eggby | Director of Photography |
| Lorne Balfe | Original Music Composer |
| Henry Brook | Special Effects |
| Andrew J. Curtis | Producer |
| Kelly Valentine Hendry | Casting |
| Robyn Owen Silvestri | Casting |
| Beatrix Aruna Pasztor | Costume Design |
| Joseph C. Nemec III | Production Design |
| Malcolm Stone | Art Direction |
| Peter Walpole | Set Decoration |
| Jamie Bishop | Art Department Coordinator |
| Ceri Hughes | Special Effects Coordinator |
| Andre Hitsøy | CG Supervisor |
| Tushar Kewlani | CG Supervisor |
| Collette Nunes | Visual Effects Editor |
| Charlotte Collings | Visual Effects Coordinator |
| Duncan Holland | Visual Effects Coordinator |
| Simon Mills | Visual Effects Coordinator |
| Lucy Tanner | Visual Effects Coordinator |
| Samantha Tracey | Visual Effects Coordinator |
| Tim Field | Visual Effects Producer |
| Gavin Gregory | Visual Effects Producer |
| Thomas M. Horton | Visual Effects Producer |
| Lorea Hoye | Visual Effects Producer |
| Amit Jhamb | Visual Effects Producer |
| Nick Drew | Visual Effects Producer |
| Peter Paul | Assistant Costume Designer |
| Annie Crawford | Costume Supervisor |
| Richard Hooper | Armorer |
| Yasmin Rais | Script Supervisor |
| Jan Archibald | Hair Designer |
| Jacqueline Fowler | Makeup Designer |
| Helen Speyer | Makeup Artist |
| Alison Wright | Music Supervisor |
| Kevin Kaska | Orchestrator |
| Paul Norris | Visual Effects Supervisor |
| Michelle Martin | Visual Effects Producer |
| Claudia Bluemhuber | Thanks |
| Camilla Naprous | Stunts |
| Rachael Evelyn | Stunts |
| Flora Moody | Makeup & Hair |
| Peter Amundson | Editor |
| Ken Petrie | Special Effects Technician |
| Jonathan English | Producer |
