Following the Queen's death, Harry and Meghan's children have been automatically proclaimed Prince Archie of Sussex and Her Majesty Princess Lilibet of Sussex.
The change is a consequence of the conventions created a year ago. Laws put in place by King George V in 1917 state that the monarch's grandchildren immediately receive royal titles.
As the grandsons of King Charles III, Archie and Lilibet have the right to be called Prince and Princess as they could not receive this title as great-grandsons of the Queen.
Last year, Meghan said her son Archie could be denied the title because of his mixed heritage. She recalled that a member of the royal family had "expressed concern and commented on how dark his skin color might be when he was born".
The Duchess said the comments came at the same time the couple learned Archie would not have a bodyguard or official title. She added that there had been "talks" during her pregnancy about changing the convention when Charles became King, meaning Archie could lose the right to the title