Colin Firth (King George VI), Geoffrey Rush (Lionel Logue), Helena Bonham Carter (Queen Elizabeth), Guy Pearce (King Edward VIII), Timothy Spall (Winston Churchill), Michael Gambon (King George V), Jennifer Ehle (Myrtle Logue) more..., Derek Jacobi (Archbishop Cosmo Lang), Freya Wilson (Princess Elizabeth), Ramona Marquez (Princess Margaret), Richard Dixon (Private Secretary), Robert Portal (Equerry), Eve Best (Wallis Simpson), Paul Trussell (Chauffeur), Adrian Scarborough (BBC Radio Announcer), Andrew Havill (Robert Wood), Charles Armstrong (BBC Technician), Roger Hammond (Dr. Blandine Bentham), Calum Gittins (Laurie Logue), Dominic Applewhite (Valentine Logue), Ben Wimsett (Anthony Logue), David Bamber (Theatre Director), Jake Hathaway (Willie), Patrick Ryecart (Lord Wigram), Teresa Gallagher (Nurse), Simon Chandler (Lord Dawson), Claire Bloom (Queen Mary), Orlando Wells (Duke of Kent), Tim Downie (Duke of Gloucester), Dick Ward (Butler), John Albasiny (Footman), Danny Emes (Boy in Regent's Park), Anthony Andrews (Stanley Baldwin), John Warnaby (Steward), Roger Parrott (Neville Chamberlain), Dean Ambridge (Royal Marine (uncredited)), James Currie (Binky (uncredited)), Graham Curry (Infantry (uncredited)), Tony Earnshaw (Policeman (uncredited)), Sean Talo (BBC Technician / Soldier (uncredited))

David Seidler (Screenplay), Bob Weinstein (Executive Producer), Paul Brett (Executive Producer), Iain Canning (Producer), Harvey Weinstein (Executive Producer), Geoffrey Rush (Executive Producer), Tim Smith (Executive Producer) more..., Alexandre Desplat (Original Music Composer), Nina Gold (Casting), Jenny Beavan (Costume Design), Danny Cohen (Director of Photography), Simon Egan (Co-Producer), Mark Foligno (Executive Producer), Peter Heslop (Line Producer), Emile Sherman (Producer), Deepak Sikka (Co-Executive Producer), Gareth Unwin (Producer), Tariq Anwar (Editor), Eve Stewart (Production Design), Leon McCarthy (Art Direction), Judy Farr (Set Decoration), Nana Fischer (Hairstylist), Paul Gooch (Makeup Artist), Carmel Jackson (Hairstylist), Frances Hannon (Hair Designer), Christine Whitney (Makeup Artist), Alex Rouse (Wigmaker), Kristyan Mallett (Prosthetic Supervisor), Erica Bensly (Production Manager), Emma Zee (Post Production Supervisor), Jeff Maynard (Executive In Charge Of Post Production), Julia Castle (Art Department Coordinator), Peter Burgis (Foley), Paul Hamblin (Sound Re-Recording Mixer), Catherine Hodgson (Sound Effects Editor), Martin Jensen (Sound Re-Recording Mixer), John Midgley (Production Sound Mixer), Forbes Noonan (ADR & Dubbing), Lee Walpole (Supervising Sound Editor), Mark Holt (Special Effects Supervisor) and others.