Donald Trump will make an unprecedented second state visit to the United Kingdom in September.

Buckingham Palace confirmed that King Charles and Queen Camilla will welcome the US president from September 17 to 19.

"His Majesty the King will host the President and Mrs. Trump at Windsor Castle," the palace said in a statement.

Trump received a personal letter from the monarch, which British Prime Minister Keir Starmer delivered to him in February during a visit to Washington DC.

At the time, Trump called the invitation a "great, great honor."

Starmer's effort to keep Trump close

No other American president has been invited twice for a state visit to the UK. It is widely seen as a strategic move by the British government to maintain close ties with Trump.

The US president was received by Queen Elizabeth II during a state visit in 2019, during his first term.

Unlike French President Emmanuel Macron, who addressed the British Parliament during his recent state visit, Trump is not scheduled to speak to the House of Commons, which will be in recess during his visit.

While Trump's trip will feature a full royal ceremony, it is also expected to draw protests, as it did in 2019.

Canadian Prime Minister Mark Carney criticized the UK's invitation, saying it undermined his government's efforts to project a united front against Trump's comments about annexing Canada.

King Charles is also Canada's head of state and he visited Canada back in May where he opened the nation's parliament.

It was seen as a sign of support amid Trump's trade war against Canada and threats to annex the country.

Edited by: Karl Sexton