Mine is the current Duchess of Gloucester.
Married a second son. Expected to be the wife of an architect who happened to be royal and the Queens cousin, with the odd swanky royal occasion here and there…
Six weeks after marrying her BIL is killed so her husband is now in line to be the Duke. Then less than two full years later they are Duke and Duchess and full time royals.
She’s been patron of the Lullaby Trust for donkeys years.