Harry and Meghan will attend Trooping the Colour with the royal family on Thursday, though the Queen will not be present.
Buckingham Palace announced in May that the Queen has decided to limit the balcony line-up to working members of the royal family, ostensibly ruling out the couple who left royal duties in 2020 as well as Prince Andrew.
However, the palace announced at the last minute that Harry and Meghan will watch the Queen’s salute from a prime vantage point with members of the monarchy, overlooking Horse Guards Parade, from the Duke of Wellington’s former office.
Prince Charles will inspect the guardsmen and officers and salute them in the Queen’s place.
Following the ceremony, the Queen will stand on the balcony of Buckingham Palace with her cousin, Colonel of the Scots Guards, the Duke of Kent, to acknowledge the salute of the returning Household Cavalry Mounted Regiment.
Later, Her Majesty will join the working royals on the balcony to watch the traditional air show.
The Duke of York, who left public life in disgrace after a sex lawsuit in the United States, is unlikely to join the royals.
The Sussexes were already planning to attend St Paul’s Cathedral’s service of thanksgiving for the Queen’s 70-year reign on Friday.
Their visit to mark the Queen’s platinum jubilee has sparked rumours that the couple will have their daughter christened with the monarch present. They are traveling with their children, three-year-old Archie and Lilibet, who turns one on Saturday.
The duke and duchess will be bringing Lilibet, who was named after the Queen, to the UK for the first time.
The Duke of Cambridge, Colonel, Irish Guards, and the Princess Royal, Colonel The Blues and Royals, will be joined by Charles, who normally participates in the Trooping ceremony on horseback in his role as Colonel, Welsh Guards.
The Duchess of Cornwall, Duchess of Cambridge, Earl and Countess of Wessex, and their children Lady Louise Windsor and Viscount Severn are among the royal family members who will travel to Trooping in the traditional carriage procession.