Prince Harry and Markle
Meghan Markle is spending Christmas with Prince Harry and the rest of the royals. Pictured: Prince Harry and Markle during an official photocall to announce their engagement at The Sunken Gardens at Kensington Palace on Nov. 27, 2017 in London. Getty Images/Chris Jackson

Meghan Markle will be joining Prince Harry, Queen Elizabeth, Prince William and Kate Middleton this Christmas.

Many were surprised to learn that the "Suits" actress is joining the royals this holiday. According to reports, Markle is the first royal fiancée to spend Christmas Day with the royal family which makes her an exception to the traditional protocol, People reported.

When the Duke and Duchess of Cambridge announced their engagement, Middleton did not spend the holiday with the royals. But according to a source, the monarch can't say "no" to Prince Harry.

"If Harry asks for something, the Queen would say yes as she adores him," a royal family told the publication.

Aside from spending Christmas with her fiancé and the royals, Markle and Prince Harry have broken his family's practice of not showing PDAs. There is no official rule restricting the royal members to show PDA, but the queen, herself, as well as the Duke and Duchess of Cambridge rarely do this.

"It certainly makes a statement," said Myka Meier, founder and director of Beaumont Etiquette. "To show PDA as a representative of the British monarchy at such an official event says everything! Rarely in the past have we seen unmarried royals showing PDA with significant others at a public event."

When Prince Harry and the "Horrible Bosses" star showed up in the 2017 Invictus Games for their first public appearance as a couple, the pair was photographed hand-in-hand. Following this sighting, they were seen on more occasions holding hands.

Prince William and Middleton do not hold hands in public. However, last week, the Duchess of Cambridge showed some rare PDA when she touched Prince William's knees as they joked around during their interview for "Blue Peter."

Prince William and Middleton reportedly avoid PDAs to look professional during their royal engagements. However, according to a body expert, there is another reason.

Robin Kermode, a body language expert says that holding hands is an act that shows one's relationship is solid. The Duke and Duchess of Cambridge "do not feel the need to prove their love" to the public. Also, the royal couple may have taken this after the queen.

"The Queen rarely holds hands with her husband in public and this seems to have set an unwritten precedent for the other royals," Kermode explained. "It is very clear that William and Kate are emotionally close, however, they do not seem to feel the need to prove their love – particularly when on official state business. They come across as a strong, independent couple and while they are always on show, they do not feel the need to show their love for each other to the world."