Main[]
- Imelda Staunton as Queen Elizabeth II
- Jonathan Pryce as Prince Philip
- Lesley Manville as Princess Margaret, Countess of Snowdon
- Dominic West as Charles, Prince of Wales
- Elizabeth Debicki as Diana, Princess of Wales
- Olivia Williams as Camilla Parker Bowles
- Claudia Harrison as Princess Anne
- Sam Woolf as Prince Edward
- Ed McVey as Prince William of Wales
- Rufus Kampa as young Prince William of Wales
- Fflyn Edwards as young Prince Harry of Wales