| Claire Foy | Princess Elizabeth |
| Matt Smith | Philip, Duke of Edinburgh |
| Victoria Hamilton | Queen Elizabeth |
| Jared Harris | King George VI |
| Vanessa Kirby | Princess Margaret |
| Eileen Atkins | Queen Mary |
| Harriet Walter | Clemmie Churchill |
| John Lithgow | Winston Churchill |
| Jeremy Northam | Anthony Eden |
| Billy Jenkins | Prince Charles |
| Clive Francis | Lord Salisbury |
| Nicholas Rowe | Jock Colville |
| Pip Torrens | Tommy Lascelles |
| Harry Hadden-Paton | Martin Charteris |
| Ben Miles | Peter Townsend |
| Daniel Ings | Mike Parker |
| Lizzy McInnerny | Bobo Macdonald |
| Michael Bertenshaw | Master of the Household |
| Simon Chandler | Clement Attlee |
| Kate Phillips | Venetia Scott |
| Greg Wise | Lord Mountbatten |
| Patrick Ryecart | Duke of Norfolk |
| Ronald Pickup | Archbishop of Canterbury |
| Nigel Cooke | Harry Crookshank |
| Will Keen | Michael Adeane |
| Patrick Drury | Lord Chamberlain |
| Jonathan Newth | Page (Buckingham Palace) |
| John Woodvine | Archbishop of York |
| James Laurenson | Doctor Weir |
| Josh Cook | Footman (Buckingham Palace) |
| Nicholas Jones | Lord Moran |
| Paul Longley | Footman (Abbey) |
| Peter Ellis | Sandringham Gamekeeper |
| Martin Bishop | King's Valet |
| Chris Gordon | Duke of Edinburgh's Valet |
| Leon Hutchings | Page Boy |
| Oliver McKinnon-Wardell | Page Boy #2 |
| Josie Kidd | Secretary |
| Christopher Ravenscroft | Page (Sandringham) |
| Mark Tandy | Cecil Beaton |
| Rosalind Knight | Princess Andrew of Greece and Denmark |
| Martin Bratanov | Photographer Assistant |
| Steve Carroll | Press |
| Teddy Lewis | Groundskeeper |
| Edward Olhausen | Choirboy |
| Andy Sanderson | Prince Henry, Duke of Gloucester |
| Johanna Smitz | Screaming Girl |
| Daniel Betts | Prince Ernst von Hannover |
| Emma Clandon | Royal Bridesmaid |
| Rita McDonald Damper | Princess Marina of Denmark and Greece, the Duchess of Kent |
| John Neville | BBC Technician |
| Nick Owenford | BBC Cameraman |
| Cadyn Page | Choir Boy |
| Bo Ponomari | Martin (footman) |
| Janette Sharpe | Naval Wife |