In 2006, Kate Middleton had been dating Prince William for the better part of five years when she was invited to the royal family’s Christmas at Sandringham by Queen Elizabeth in a precedent-breaking move. (Typically, only husbands and wives of royals get the invitation.) Here is why the Princess of Wales, then just 24, turned the Queen down.
https://people.com/queen-elizabeth-broke-precedent-invited-kate-middlet…