He added, speaking of the King, that he has “done this for so long” so will likely be feeling slightly different on the day to his wife.
Although he added that the King will be “very particular” about one thing – “making sure everyone knows what they are doing”.
Harrold added that the King will “trust” that everyone will “get it right”.
He added that the Queen Consort “really loves” the King and is “not in it for this [the Coronation]”.
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The pair will be getting crowned in London in just over two weeks, watched on by many members of the Royal Family.
Some of the royals set to be in attendance include the Prince and Princess of Wales, Princess Anne and the Duke and Duchess of Edinburgh.
The Waleses’s three children – Prince George, Princess Charlotte and Prince Louis – will all be present for their grandfather’s big day.
Following the Coronation edging close, speculation grew over whether Prince Harry will travel to the UK for his father’s special day.
However, the Palace have confirmed that the Duke of Sussex will join the Royal Family at Westminster Abbey. The Duchess of Sussex will not join Harry and will remain in the US with the couple’s two children – three-year-old Archie and Lilibet, 1.
Earlier this month, it was confirmed that Prince George – the eldest of Prince William and Kate’s three children – will hold a special role at the Coronation.
The young royal, who will turn 10 in July, will act as one of the King’s Pages of Honour.
George has been one of eight chosen for the role.