Prince Harry and Meghan Markle's children become Prince Archie and Princess Lilibet following the Queen's passing

Following the death of Queen Elizabeth II, Prince Harry and Meghan Markle's son, Archie Mountbatten-Windsor, is now technically a prince.

His younger sister, Lilibet "Lili" Mountbatten-Windsor, is also entitled to be a princess after the accession of her grandfather, the Prince of Wales, to the throne.

Under protocols established by King George V in 1917, the children and grandchildren of a sovereign have the automatic right to the title HRH and prince or princess.

The first-born son of a future king - as was Prince George - is also automatically a prince.

Meghan argued in the Sussexes' bombshell interview with US talk show host Oprah Winfrey that Archie was not given the title of prince because of his race.

However, at the time Archie and Lili were born, they were the great-grandchild of a sovereign, not a grandchild.

If King Charles decides to limit the number of key royals, he will have to issue a Letters Patent amending Archie's right to be a prince and Lili's right to be a princess.

Until that potentially happens, Archie and Lili remain a prince and princess, whether their parents choose to use the titles or not.

Eventually Archie will be entitled to succeed Harry as the Duke of Sussex.