If the royal family’s recent family video is any indication, Prince George, 11 and Princess Charlotte, 9 have a wholesome, goofy, and incredibly close relationship. But a strict and longstanding royal rule will quite literally pull the siblings apart next year.

A royal rule prohibits Prince George from traveling with his sister, Princess Charlotte, in order to safeguard the line of succession

If the family wishes to travel together, they may now need to seek permission from King Charles, as the current monarch. If history repeats itself and the Royal rule is applied, it means that George, at just 12 years old, will have to travel separately from his family for the rest of his life.

Princess Charlotte and her brother Prince George attended the Queen's funeral service at St George's Chapel in Windsor on this day two years ago, and the young Royal shared a sweet moment with her uncle Prince Harry.

Princess Charlotte is already emerging as a little style icon - and she could have the same selling power as her fashionable mum, Princess Kate, whose clothes fly off the shelves

Prince Harry and Meghan Markle may have made California their permanent home, but they once resided in Frogmore Cottage in the UK, where they fulfilled royal duties and welcomed their eldest

Prince George, Princess Charlotte, and Prince Louis have a special connection to their great-grandmother, the late Queen, at their Scottish holiday home

Prince Archie has met his cousins Prince George, Prince Louis and Princess Charlotte for playdates, but perhaps not younger sister Princess Lilibet.