Prince Harry and Meghan Markle's first-born, Archie Mountbatten-Windsor, will reportedly be forced to abide by a special royal marriage rule, leaving his sister Lillibet exempt, reports Express UK.
The royal tot born to Harry and Meghan in 2019, though not close to the royal family since their parents moved to the US, will rise further up the line of succession when their grandfather, Prince Charles, ascends the throne in time .
Archie, who is currently the Queen's great-grandson, will also be the grandson and nephew of two future monarchs, Prince Charles and Prince William, meaning he will be bound by a special royal regime; The Succession to the Crown Act of 2013.
According to Express UK, the rule was put in place to replace the system of male-preference inheritance in the British monarchy, but according to this, "Archie will need to ask the permission of the Sovereign if he decides to marry in the future, or he may lose its place in the line of succession."
According to the act, if Archie, or any other royal, does not seek the monarch's permission before marrying, he and his descendants will be disqualified from marriage by the line of succession.
Currently, Archie and sister Lilibet are seventh and eighth in line to the British throne.