The Queen will welcome US President Joe Biden to Windsor with a Guard of Honour and tea at the castle.
The American leader and First Lady Jill Biden will visit her Berkshire royal residence on Sunday, after attending the G7 summit in Cornwall.
The couple met the Queen on Friday when she attended a reception for G7 leaders at the Eden Project.
The traditional Trooping the Colour ceremony, which is normally staged in London, was ruled out for the second successive year because of the threat of coronavirus.
The carefully-choreographed arrangements to welcome Mr Biden echo the welcome given to Donald Trump in 2018, when the controversial then-US president travelled to Windsor to meet the monarch.
It was due to last around half-an-hour, but overran by almost 20 minutes.
In 2008, when then US president George W Bush met with the monarch at Windsor, he enjoyed a traditional English afternoon spread of tea, small sandwiches and cakes in the White Drawing Room.
A Guard of Honour formed of The Queen’s Company First Battalion Grenadier Guards will give a Royal Salute, and the US national anthem will be played.
Mr Biden will then accompany the Officer Commanding the Guard of Honour, Major James Taylor, and Major General Christopher Ghika to inspect the Honour Guard, before returning to the dais to watch the military march-past with the Queen and First Lady.
In 2018, the Queen accompanied Mr Trump to inspect the Guard of Honour at Windsor.
There have been 14 US presidents during the Queen’s 69-year reign – from Harry S Truman to Mr Biden.
Mr Biden, who is in the UK for the G7 summit, will be the 13th American leader to meet the monarch, with Lyndon B Johnson the only one the Queen has not met.