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Famous people who sit next to the Queen or the King for dinner should wait until they take the initiative and initiates conversation. And it goes without saying that impeccable table manners are a must.
Some Buckingham Palace rooms are off-limits, even for celebrities.
Everyone should make eye contact when speaking and being spoken to by the Queen, including celebs. It looks like Vogue's Anna Wintour breached royal protocol.
Usually celebs have to do so via email and then by responding to a formal invitation by mail.
The Prince and Princess of Wales are the patrons of the British Film Academy and are always the last to arrive. Everyone, including celebs, must give them a standing ovation when they enter a room.
Yes, celebs must also abide by the traditional dress code. This includes classic, formal attire and a hat for the ladies.
Protocol is not as strict as it once was on this, but famous faces will likely have professional photographers or paparazzi capturing the moment anyway.
The Queen is the one expected to shine, not you. In this case, it was Elton John, so bright and flashy was to be expected.
This is a no-no. Even for famous people. Don't do it.
What, you're a busy artist and need to be somewhere else? You still have to wait until the member of the royal family leaves or gives you permission to do so.
Though this is no longer as strict, the royal family is not supposed to give autographs, even if it's for a celeb.
Even big stars have to try hard to follow royal protocol without freaking out about meeting the Queen or King.
Yes, royal press correspondents have a dress code they must follow.
Source: (Marie Claire)
See also: The royal family's secret travel rules
Everyone must stand when the Queen or the King enters a room, regardless of your status.
A good sense of humor is great, and the royals appreciate it, but it's best to keep the jokes to yourself.
Even famous plus-ones should stand behind the guest and should only speak when spoken to.
And they'll brief it to the member of the royal family prior to their meeting.
All other members of the royal family don't require this formal greeting.
And celebrities can't even address members of the royal family by their first name.
A simple handshake will suffice when meeting a royal, no matter how famous you are.
When it comes to formality, celebs are expected to follow the royal lead on it.
Well, this will depend on their level of intimacy, but the physical contact should always be initiated by the royal.
Celebs must be aware of security, and not to be tempted to crack a joke that might be perceived as threatening to the royal family.
Beyoncé referred to Meghan Markle as "my princess" at 'The Lion King' premiere.
Personal aides will liaise with celebs in advance and will likely be present when they meet.
Classic royal protocol that everyone should follow, including celebs.
Yes, they'll receive instructions on royal protocol beforehand, so they know what to expect and how to behave accordingly.
The Royal is supposed to be the last person to arrive at any given event, so celebs must be there beforehand, waiting for her.
Helen Mirren did so once, due to her busy filming schedule, and the story ended up in the press.
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.
Rules celebrities must follow when meeting the royals
When celebs are peasants just like us
CELEBRITY British royal family
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.