WASHINGTON — King Charles III will travel to the US for a state visit late next month, a source familiar with the plans tells The Post.

While details are still being finalized, the British monarch’s itinerary includes a state dinner at the White House as well as a day trip to New York City. 

Charles will visit the 9/11 Memorial in Lower Manhattan on his junket to the Big Apple, according to sources, with other stops possible.

The king is also expected to address a joint meeting of Congress, according to Punchbowl News, as part of the three-day trip, which was first reported by Page Six.

In preparation for the royal occasion, House Republican leadership announced Monday the chamber will be in session the week of April 27 — altering the initial schedule.

Charles’ late mother, Queen Elizabeth II, made the last state visit by a member of the British royal family to the US in 2007, during which she marked the 400th anniversary of the settlement of Jamestown, Va., and attended the Kentucky Derby.

The late queen also paid a state visit during celebrations of America’s bicentennial in 1976, while King Charles will visit ahead of the 250th birthday of the United States.

President Trump traveled to the UK in September 2025, taking Charles up on his offer of an unprecedented second state visit.

The commander-in-chief was previously received by Queen Elizabeth II in June 2019.

Trump is a longtime admirer of the royal family and described the current king last week to reporters as a “great guy” who would be “coming in very soon.”

However, the president has been fiercely critical of the British government headed by Prime Minister Keir Starmer over its reluctance to join the American and Israeli war against Iran, leading at least one prominent politician to suggest the royal visit should be postponed.

“If it was to go ahead, it would go ahead against a backdrop of a war, and that, I think, is quite difficult,” Labour Member of Parliament Emily Thornberry told BBC Radio 4 last week, “and the last thing that we want to do is to have Their Majesties embarrassed.”

“This is not Winston Churchill we’re dealing with,” Trump told reporters in the Oval Office March 3 after the UK declined to let the US use the joint base at Diego Garcia to carry out strikes on Tehran.

“I was not happy with the UK,” he added at a separate event March 16. “I think they’ll be involved, maybe, but they should be involved enthusiastically.”