The US president, Joe Biden, is to meet the king in Windsor and Rishi Sunak in London when he visits the UK in the second week of July.
Biden will make the long-expected visit as he travels to Vilnius in Lithuania for a Nato summit and then to Finland for a US-Nordic leaders conference.
Biden made a whistle-stop visit to Northern Ireland earlier this year to mark the 25th anniversary of the Good Friday agreement, while Sunak travelled to Washington last month.
The visit was announced by the White House press secretary, Karine Jean-Pierre, who said it would “further strengthen the close relationship between our nations”.
During Sunak’s visit to the White House, the two leaders announced a new partnership, the “Atlantic declaration”, to bolster economic security. This included commitments on easing trade barriers, closer defence industry ties and a data protection deal.
Biden is of Irish heritage and claimed on his visit to the island of Ireland that he wanted to ensure the “Brits didn’t screw around” in relation to the impact of Brexit on the peace process.
He also told the Irish parliament he believed the UK should be working more closely with the administration in Dublin to support Northern Ireland.
Biden last visited London for the funeral of Queen Elizabeth. He did not go to the king’s coronation, with his wife attending instead.
Buckingham Palace said: “The king will meet the president of the United States of America at Windsor Castle on Monday 10 July.”