The rehearsals have taken place and the finishing touches ahead of King Charles's coronation are in the final stages.
But there is one aspect of the big day that can't be controlled, and that's the weather.
Rain looks likely to fall in the capital on Saturday at the time of the coronation, and it looks set to impact a significant moment for the royal family.
There is a risk that the flypast over Buckingham Palace will be cancelled as a result of the bad weather.
But the Met Office has forecast grey cloud with bursts of rain on Saturday afternoon which could impact visibility for the pilots.
The flypast has been a key moment at a number of major royal events, including the Queen's Jubilee celebrations. The late monarch was known to love watching the display and was seen pointing out the incoming aircraft to Prince Louis from the balcony just last year. See little Louis reacting to the flypast in our video below...
The news has sparked some concern amongst royal fans that the balcony appearance could also be cancelled as a result.
However, it’s more than likely that, regardless of the weather, the new King and Queen and their family will still greet the excited crowds from the balcony.
It comes after Charles and Camilla were spotted at a rehearsal at Westminster Abbey on Wednesday.
The couple were in high spirits, smiling and chatting to attendants as they joined the Prince and Princess of Wales and their three children for a final run-through of Saturday’s ceremony.
Also there were Camilla's grandsons, who will act as her pages of honour.
The coronation rehearsal was particularly important for Prince George, who has been given the honour of acting as one of his grandfather's pages. He will walk behind the King, carrying his robes as he enters and leaves the Abbey.
William, meanwhile, will kneel before his father and vow to be his “liege man of life and limb” in the only homage of royal blood of the ceremony. He will also help clothe the King in his golden robe royal, also known as the mantle, ahead of his crowning.
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