The Queen, Kate Middleton, Prince Charles and Camilla have all dressed up in their finest to attend a number of state banquets over the years.
The dinners are big occasions that take a lot of planning - from the guest list down to the food that will be served.
And with so many people flocking to the palace to attend the special event, including some of the most powerful people in the world, staff have to stay on their toes making sure everyone is safe.
One of the ways they do this is ensuring that no one can poison Her Majesty by slipping something into her food during the occasion.
It turns out that the serving staff have a clever trick to make sure this doesn't happen - the Queen never has an assigned plate, but is instead given a meal at random.
In Channel 5's Secrets of the Royal Kitchens, royal correspondent Emily Andrews explained: "After everything is plated up, a page chooses at random one of the plates to be served to Her Majesty.
"So if anyone did want to poison the monarch they’d have to poison the whole lot."
When she's not attending grand dinners, the Queen's evening routine is very, very different according to another royal expert.
During the programme, Royal biographer Lady Colin Campbell revealeded that the Monarch's day-to-day tastes are much more modest.
The Queen has her pick of lavish dining rooms but instead, she is said to choose to eat her evening meal in the comfort of her own living room.
And like many of her subjects, the monarch enjoys nothing more than a TV dinner.
Lady Campbell explained: "She has her dinner off a tray looking at the television.
"She likes it. It's homely and cosy and it's comfortable."
And even though she doesn't cook her own meals, the Queen still oversees all the palace food.
Former royal chef Darren McGrady added: "The chef does three days' menus and that gives us enough time to get all the produce in and prepare it.
"When the menu book goes up to the Queen she puts a line through all the dishes she doesn’t want."
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