The Queen is set to meet President Donald Trump on Friday, according to Buckingham Palace.
She will meet with Mr Trump and First Lady Melania Trump at Windsor Castle as part of his UK visit this week.
A guard of honour formed of the Coldstream Guards will give a royal salute and the US national anthem will be played.
The Queen and Mr Trump will inspect the guard of honour before watching the military march past.
They will then have tea at the castle.
He will travel straight to Blenheim Palace in Oxfordshire, where Theresa May will host Mr Trump and his wife Melania for a black-tie dinner with 100 guests and ministers.
The evening will start with a military ceremony in the palace’s Great Court performed by the bands of the Scots, Irish and Welsh guards.
The president and first lady will then travel to Winfield House, the American ambassador’s residence in Regent’s Park, where he is able to land by helicopter.
On Friday, Mr Trump and Mrs May will visit a defence site to watch a demonstration of the UK’s military capabilities and “integrated US military training”.
They will then travel to the Prime Minister’s country home Chequers for bilateral talks on a range of foreign policy issues including trade.
From Friday evening the president and first lady will travel to Scotland where they will spend the rest of their trip before Mr Trump departs on Sunday evening.
Almost every force across England and Wales has agreed to mobilise offers to cover every destination of the President's visit.
The huge operation will cost between £8 million and £10 million and will leave home forces covering owed time off for months, senior police officials warned.
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Mr Trump also spoke warmly of his "friend" Boris Johnson, suggesting that they might meet in the UK despite Mr Johnson's shock resignation as Foreign Secretary on Monday.
