Princess Eugenie’s baby son, who has been named August, was born 11th in line to the throne.
He will move to 12th place once the Duke and Duchess of Sussex’s second child arrives.
August Philip Hawke Brooksbank falls after Eugenie and before the Earl of Wessex in the line of succession.
Edward, who was third in line when he was born in 1964, is currently in 12th place.
Until Baby Sussex arrives, the first 10 places remain unchanged – the Prince of Wales, the Duke of Cambridge, Prince George, Princess Charlotte, Prince Louis, the Duke of Sussex, Archie Mountbatten-Windsor, the Duke of York, Princess Beatrice and Eugenie.
With so many people ahead of him in line to the throne, August is extremely unlikely ever to become monarch.
He will move down the succession list through the years if the Cambridge and Sussex children have their own families in the future.
Monarchs have very occasionally acceded to the throne from low down the list.
King George I was 52nd in line, but was chosen over at least 50 of his Catholic relatives in 1714 as the nearest Protestant, according to the Act of Settlement.
Eugenie and Jack Brooksbank’s son is not entitled to use an HRH style, nor to have a title.
His father has no title and he has been born down a female line of the royal family, with rules issued by King George V in 1917 limiting royal titles.
He is a regular Master Brooksbank.