Westminster Abbey will close its doors to the public on 25 April to prepare for the King's coronation.
Preparations are well underway for the crowning of King Charles and his wife, Queen Consort Camilla, on 6 May.
There are still a number of intricacies yet to be figured out, including whether Harry and Meghan will RSVP.
The BBC's royal correspondent Jonny Dymond spoke to Māni Dunlop.
