Meghan has been warned of one bizarre royal rule ahead of spending Christmas with the queen

The royal family has strict rules and protocol in place for just about everything, even what they do in their down time.

Being a royal is a 'round the clock role and so Prince Harry has reportedly been prepping Meghan Markle as she gets ready to spend Christmas with her in-laws. Among the rules that Meghan is expected to follow is one that anyone with a competitive family will relate to - she's not allowed to beat the queen at charades. The family play it together every year at Christmas time and it appears that the monarch really doesn't like to lose. "It can be very confusing," a royal aide told The Daily Express. “The jokes and presents are very cheesy, the life is grand, the protocol is unbending and it terrifies the life out of incomers. “They don’t like show-offs, especially newcomers who show off. “The duchess has to resist that American urge to win at everything. "The whole family likes to play charades on Christmas night and she must never beat the queen, who is a fine actress herself.” Making sure she doesn't win is not the only odd thing Meghan will have to do on Christmas Day with the royals. The family also has a tradition of weighing themselves before and after their Christmas meal. It goes back to the reign of King Edward in the early 1900s but probably not something Meghan, who is expecting her first baby, will be keen to take part in.