| Olivia Colman | Queen Elizabeth II |
| Tobias Menzies | Prince Philip, Duke of Edinburgh |
| Josh O'Connor | Prince Charles |
| Emma Corrin | Princess Diana |
| Erin Doherty | Princess Anne |
| Emerald Fennell | Camilla Parker Bowles |
| Charles Edwards | Martin Charteris |
| Richard Goulding | Edward Adeane |
| Andrew Buchan | Andrew Parker Bowles |
| Alana Ramsey | Sarah Lindsay |
| Tom Turner | Patrick Jephson |
| David Phelan | Dickie Arbiter |
| Jay Webb | Wayne Sleep |
| Luke Cinque-White | Wayne Sleep's Assistant |
| Daniel Donskoy | James Hewitt |
| Robert Cavanah | Psychiatrist |
| Lucas Barber-Grant | Prince William |
| Arran Tinker | Prince Harry |
| Judith Paris | Wendy Mitchell |
| Daniel Fraser | Queen's Equerry |
| Charlie Richards | Queen's Page |
| Daniel Gosling | TV Commentator |
| Nathan Vale | Tenor |
| Georgia Howlett | Ballet Dancer |
| Aitor Viscarolasaga Lopez | Ballet Dancer |
| Michael Buerk | Newsreader |
| John Humphrys | Newsreader |
| Jonathan Addis | Royal Detective |
| Manoj Anand | Theatre Royalist |
| Nicholas Blatt | Palace Press Officer |
| Oliver Crocker | Mourner |
| Nick Davison | Friend of the Royal Opera House |
| Scott Hume | Royal Detective (for Prince Charles) |
| Yasmin McCullough | Lady Sarah Armstrong Jones |
| Philip John Patrick Oliver | Photographer |
| Nick Owenford | Theatre Press Cameraman |
| Kemal Shah | VIP Guest |
| David Stokes | Princess Diana's Personal Assistant |