Although she is unlikely to ever become queen, it is not unheard of for a second child in the direct line of succession to accede to the throne.
Mostly recently the Queen’s own father, King George VI, replaced his elder brother, King Edward VIII, who abdicated over his love for the ‘unsuitable’ American divorcee Wallis Simpson.
The Succession to the Crown Act, passed in 2013, means that male heirs no longer precede their elder sisters in the line of succession.
A 2012 intervention by the Queen also means that the new baby will automatically become a HRH – Her Royal Highness – and be permitted to take the title of princess.
As the second child of the second heir to the throne she would, until then, only have been a Lady.
Her arrival will shunt her uncle, Prince Harry, down to fifth in the order of succession.
“Harry never wanted to be King. He is fine being bumped into 5th place,” a pal tells NAUGHTY GOSSIP. “He is delighted with the new princess and cannot wait to meet her.”