The film is based on the story of William of Cambridge and Catherine Middleton. Shown in the same life of William of Cambridge, and Catherine Middleton met at the University of Saint Andrews, besides the romance that they maintained, the break of it and commitment.
| Actor | Role |
|---|---|
 Alice St. ClairKate Middleton | Kate Middleton |
 Dan AmboyerHRH Prince William of Wales | HRH Prince William of Wales |
 Jane AlexanderHM Queen Elizabeth II | HM Queen Elizabeth II |
 Victor GarberHRH Prince Charles | HRH Prince Charles |
 Lesley HarcourtHRH Princess Diana | HRH Princess Diana |
 Jean SmartHRH Camilla | HRH Camilla |
| SStanley EldridgeHRH Prince Harry | HRH Prince Harry |
 Mark PenfoldHRH Prince Philip | HRH Prince Philip |
 Sebastian BeaconDuncan | Duncan |
 Lucy PhelpsAlicia | Alicia |
 Keir CharlesLewis Grisby | Lewis Grisby |
| VVasilescu ValentinJames | James |
| KKazia PelkaCarole Middleton | Carole Middleton |
 Michael LumsdenMichael Middleton | Michael Middleton |
 Emily HeadCynthia | Cynthia |