Original sixties supermodel Twiggy is the latest celebrity to receive a damehood, awarded with the prestigious accolade for her services to fashion, charity and the arts.
Not one to put a fashion foot wrong, the 69-year-old met Prince Charles in a chic £1,645 co-ord by Stella McCartney – a lesson in diplomatic dressing.
But the history-making moment left us wondering, what on earth does one wear for a meeting at Buckingham Palace?
In arguably one of the most famous British-royalty-meets-pop-royalty photographs of all time, a sunglasses-clad Kanye West is seen partying with Princes Harry and William back in 2007.
While Lady Gaga certainly wasn’t going to follow protocol when curtseying to the Queen during her more boundary-pushing heyday.
From Victoria Beckham to One Direction, here’s what some of your favourite celebrities wore to meet the Windsor clan.