Inspired by the royal wedding and retelling the highs and lows of the nine-year courtship of Kate Middleton and Prince William. The couple struggles to keep their relationship together in the face of intense media scrutiny and family pressures, but the story ultimately ends in a fairytale wedding.
| Actor | Role |
|---|---|
 Camilla LuddingtonKate Middleton | Kate Middleton |
 Nico Evers-SwindellPrince William | Prince William |
 Victoria TennantCelia | Celia |
 Charles ShaughnessyHelicopter Flight Instructor | Helicopter Flight Instructor |
 Ben CrossPrince of Wales | Prince of Wales |
 Serena Scott ThomasCarole Middleton | Carole Middleton |
| SSamantha WhittakerOlivia Martin | Olivia Martin |
 Trilby GloverMargaret Hemmings-Wellington | Margaret Hemmings-Wellington |
 Jonathan Patrick MooreIan Musgrave | Ian Musgrave |
 Richard Alan ReidDerek Rodgers | Derek Rodgers |
 Christopher CousinsMichael Middleton | Michael Middleton |
| CCalvin GoldspinkJames Middleton | James Middleton |
 Sloane AveryBeautiful Girl (uncredited) | Beautiful Girl (uncredited) |
 Antoine WilliamsBotswana Band Member (uncredited) | Botswana Band Member (uncredited) |