Sisters-in-law Sarah Ferguson, the Duchess of York, and Diana Spencer, the Duchess of Windsor, lead glamorous, often tumultuous lives under the watchful eye of their mother-in-law, the Queen.
| Actor | Role |
|---|---|
| SSallyanne LawSarah Ferguson | Sarah Ferguson |
| NNicola FormbyDiana Spencer | Diana Spencer |
 Jim PiddockPrince Charles | Prince Charles |
| RRobert MeadmorePrince Andrew | Prince Andrew |
 Nigel BennettLawson | Lawson |
| CCarolyn SadowskaQueen Elizabeth II | Queen Elizabeth II |
 Deborah DuchêneAlice | Alice |
 David FoxMajor Ferguson | Major Ferguson |
| DDixie SeatleCamilla Parker Bowles | Camilla Parker Bowles |
 Eugene Robert GlazerPaddy McNally | Paddy McNally |
 Barbara GordonDowning | Downing |
| NNeil MunroTony | Tony |
| DDeborah BurgessPrincess Anne | Princess Anne |
| AAlan MurleyMark Phillips | Mark Phillips |
| TTrulie MacLeodPrincess Margaret | Princess Margaret |
| RRon PaynePrince Philip | Prince Philip |
 Donald CarrierPrivate Secretary | Private Secretary |
 Dan LettAssistant Press Secretary | Assistant Press Secretary |
| AAdam BrambleDoctor | Doctor |
 Torri HigginsonGwen | Gwen |
 Kristina NicollPriscilla | Priscilla |
 John SwindellsPolice Instructor | Police Instructor |
| LLeslie TiddDuke of Cumberland | Duke of Cumberland |
| CClaire CrawfordDuchess of Cumberland | Duchess of Cumberland |