There's more to meeting a member of the British royal family than just showing up and doing a curtsy. In fact, the only royal you're obliged to greet like this is the King and the Queen. But how about other details of royal protocol, do they still apply to celebrities? And what are they, really?
We've previously looked at what celebrities wore when they met the Queen, and after you've read this gallery, you'll see that some might have broken royal protocol. Click on.