 | Colin Firth als King George VI |
 | Geoffrey Rush als Lionel Logue |
 | Helena Bonham Carter als Queen Elizabeth |
 | Guy Pearce als King Edward VIII |
 | Timothy Spall als Winston Churchill |
 | Michael Gambon als King George V |
 | Jennifer Ehle als Myrtle Logue |
 | Derek Jacobi als Archbishop Cosmo Lang |
 | Freya Wilson als Princess Elizabeth |
 | Ramona Marquez als Princess Margaret |
 | Richard Dixon als Private Secretary |
 | Robert Portal als Equerry |
 | Eve Best als Wallis Simpson |
 | Paul Trussell als Chauffeur |
 | Adrian Scarborough als BBC Radio Announcer |
 | Andrew Havill als Robert Wood |
 | Charles Armstrong als BBC Technician |
 | Roger Hammond als Dr. Blandine Bentham |
 | Calum Gittins als Laurie Logue |
 | Dominic Applewhite als Valentine Logue |
| Ben Wimsett als Anthony Logue |
 | David Bamber als Theatre Director |
| Jake Hathaway als Willie |
 | Patrick Ryecart als Lord Wigram |
 | Teresa Gallagher als Nurse |
 | Simon Chandler als Lord Dawson |
 | Claire Bloom als Queen Mary |
 | Orlando Wells als Duke of Kent |
 | Tim Downie als Duke of Gloucester |
| Dick Ward als Butler |
 | John Albasiny als Footman |
| Danny Emes als Boy in Regent's Park |
 | Anthony Andrews als Stanley Baldwin |
| John Warnaby als Steward |
| Roger Parrott als Neville Chamberlain |
| Dean Ambridge als Royal Marine (uncredited) |
 | Julianne Buescher als Mrs. Cooper - Vocalist |
| James Currie als Binky (uncredited) |
 | Graham Curry als Infantry (uncredited) |
| Tony Earnshaw als Policeman (uncredited) |
| Sean Talo als BBC Technician / Soldier (uncredited) |
| Alexandre Desplat | Original Music Composer |
| Iain Canning | Producer |
| Harvey Weinstein | Executive Producer |
| Paul Brett | Executive Producer |
| Geoffrey Rush | Executive Producer |
| Tim Smith | Executive Producer |
| Tom Hooper | Director |
| Bob Weinstein | Executive Producer |
| Jenny Beavan | Costume Design |
| Nina Gold | Casting |
| Danny Cohen | Director of Photography |
| Mark Foligno | Executive Producer |
| Deepak Sikka | Co-Executive Producer |
| Simon Egan | Co-Producer |
| Peter Heslop | Line Producer |
| Gareth Unwin | Producer |
| Emile Sherman | Producer |
| Judy Farr | Set Decoration |
| Leon McCarthy | Art Direction |
| Eve Stewart | Production Design |
| Tariq Anwar | Editor |
| Christine Whitney | Makeup Artist |
| Thomas M. Horton | Visual Effects Producer |
| Derek Bird | Visual Effects Supervisor |
| Kelly Fischer | Digital Compositors |
| Emma Zee | Post Production Supervisor |
| Migs Rustia | Visual Effects Editor |
| Forbes Noonan | ADR & Dubbing |
| Charlotte Collings | Visual Effects Coordinator |
| Alex Rouse | Wigmaker |
| Paul Hamblin | Sound Re-Recording Mixer |
| Danny S. Kim | Visual Effects |
| Paul Stemmer | Visual Effects Editor |
| Frances Hannon | Hair Designer |
| Lee Walpole | Supervising Sound Editor |
| Viral Thakkar | CG Supervisor |
| James Davis III | Special Effects |
| Hanuman Patel | Digital Compositors |
| John Midgley | Production Sound Mixer |
| Collette Nunes | Visual Effects Editor |
| Paul Gooch | Makeup Artist |
| Erica Bensly | Production Manager |
| Julia Castle | Art Department Coordinator |
| Peter Burgis | Foley |
| Cyntia Büll | Digital Compositors |
| Nana Fischer | Hairstylist |
| Jeff Maynard | Executive In Charge Of Post Production |
| Mark Holt | Special Effects Supervisor |
| Kristyan Mallett | Prosthetic Supervisor |
| Martin Jensen | Sound Re-Recording Mixer |
| Tony Tromp | Visual Effects Editor |
| Ilamuruguselvan | Digital Compositors |
| Melinka Thompson-Godoy | Visual Effects Producer |
| Carmel Jackson | Hairstylist |
| Catherine Hodgson | Sound Effects Editor |
| Jeff Smithwick | Color Timer |
| Paul McGeachan | Gaffer |
| Maggie Rodford | Music Supervisor |
| Richard Payten | Thanks |
| Jean-Pascal Beintus | Orchestrator |
| Andrew Mackie | Thanks |
| Zac Nicholson | Steadicam Operator |
| Nicolas Charron | Orchestrator |
| Carl Isherwood | Transportation Captain |
| Simon Jones | Transportation Captain |
| Dennis Davidson | Public Relations |
| Cathy Doubleday | Script Supervisor |
| Neil Swain | Dialect Coach |
| Christos Michaels | Thanks |
| Laurie Sparham | Still Photographer |
| Jamie Lengyel | Location Manager |
| David Broder | Location Manager |
| Camilla Stephenson | Location Scout |
| Sylvain Morizet | Orchestrator |
| Philip Lobban | Location Scout |
| Danny Cohen | Camera Operator |
| Peter Clarke | Music Editor |
| Albert Martínez Martín | Thanks |
| Teresa Mahoney | Stand In |
| David Hindle | Supervising Art Director |
| Gerard McCann | Supervising Sound Editor |
| Steve Morphew | Stand In |
| Bruce Bigg | Property Master |
| Chris Stoaling | Second Assistant Director |
| Matthew Skelding | Dialogue Editor |
| Martin Harrison | First Assistant Director |
| Andre Schmidt | Dialogue Editor |
| Andie Derrick | Foley |
| Ludwig van Beethoven | Additional Music |
| Martin Kenzie | Second Unit Director of Photography |
| Marco Scotti | Costume Supervisor |
| Sally Turner | Assistant Costume Designer |
| Gareth Spensley | Colorist |
| Fiona Garland | Production Coordinator |
| Marilyn Goldsworthy | Production Accountant |
| Emma Davie | Unit Publicist |
| Nick Jeffries | Armorer |
| Scarlett Mackmin | Choreographer |
| Edwin Morris Hooper | In Memory Of |
| Alan Chesters | Construction Manager |
| Douglas Ingram | Storyboard Artist |
| Philip Clements | Assistant Sound Editor |
| David Seidler | Writer |
