London, UK – It will be a tea party fit for a queen – and a president!

Will the world leaders be spilling the tea during their royal afternoon tea ceremony?

On Sunday, President Joe Biden will be welcomed to Windsor by Queen Elizabeth II with a guard of honor, followed by tea with the monarch at the castle as part of his first visit to the UK since becoming president.

Biden arrived in Cornwall early on Thursday morning for his first G7 summit, and met with British Prime Minister Boris Johnson.

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Biden briefly met the 95-year-old queen at a reception on Friday at the Eden Project, a botanical garden, along with other members of the royal family.

The queen is preparing to host the American leader and first lady Jill Biden for the longer Sunday visit at her Berkshire royal residence, Buckingham Palace confirmed.

The carefully choreographed arrangements echo the welcome given to Donald Trump in 2018, when the controversial former president travelled to Windsor to meet the monarch.

Trump and the queen had afternoon tea together in the castle's Oak Room, with the meeting lasting longer than expected.

It was due to last around half an hour, but overran by almost 20 minutes.

In 2008, when then president George W Bush had tea with the monarch at Windsor, he enjoyed a traditional English afternoon spread of tea, small sandwiches, and cakes in the White Drawing Room.

The queen will meet the Bidens at the dais in the castle's quadrangle. A guard of honor, formed of The Queen's Company First Battalion Grenadier Guards, will give a royal salute, and the US national anthem will be played.

Biden will then accompany the officers commanding the guard of honor, Major James Taylor and Major General Christopher Ghika, to inspect the honor guard, before returning to the dais to watch the military march with the queen and first lady.

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In 2018, the queen also accompanied Trump to inspect the guard of honor at Windsor.

Escorting a visiting head of state to inspect the troops is a role which usually fell to the late Duke of Edinburgh, before he retired in 2017. The royal family paid tribute to him on what would have been his 100th birthday on Thursday.

There have been 14 US presidents during the queen's 69-year reign – from Harry S Truman to Biden. Last week, the palace announced the UK will celebrate her historic Platinum Jubilee next June, a feat no other monarch has attained.

Biden, who is currently making his first trip abroad since his presidency, is in Britain for the G7 summit. He will be the 13th American leader to meet the monarch. Lyndon B Johnson is the only president the queen has not met during her reign.