In his speech on the South Lawn, President Trump took a moment to remember Queen Elizabeth II, who he called "an incredible woman who I had the privilege of getting to know."

Trump was received by Queen Elizabeth at Buckingham Palace during a state visit in 2019, during his first term.

Trump said the late monarch was a "very special woman who is very greatly missed on both sides of that mighty Atlantic."

President Trump, King Charles, first lady Melania Trump and Queen Camilla observed the military flyover from the balcony of the White House.

Next, they are expected to go into the White House Blue Room, where King Charles and Queen Camilla will sign the White House guest book and exchange gifts with the president and first lady.

Amid diplomatic tension between the U.S. and the U.K. over the war in Iran, President Trump spoke about the "special relationship" between the two nations.

"In the centuries since we won our independence, Americans have had no closer friends than the British," Trump said. "We share that same root. We speak the same language, we hold the same values, and together, our warriors have defended the same extraordinary civilization under twin banners of red, white and blue."

"What a beautiful British day this is," President Trump said as he kicked off remarks with thousands of guests gathered outside the White House South Lawn on a rainy morning in Washington.

The royals' state visit is to mark the 250th anniversary of American independence from Great Britain.

"Honoring the British king might seem an ironic beginning to our celebration of 250 years of American independence, but in fact, no tribute could be more appropriate," Trump said. "Long before Americans had a nation or a Constitution, we first had a culture, a character and a creed."

Supreme Court justices, CEOs and a golf champion are all on the list of attendees for Tuesday's state dinner honoring King Charles III.

Chief Justice John Roberts and his wife will be in attendance, as well as Supreme Court Justices Samuel Alito, Amy Coney Barrett, Neil Gorsuch, Brett Kavanaugh and Clarence Thomas, according to the list shared by the first lady's office.

The list also includes pro golfer and Master's winner Rory McIlroy and his wife, as well as Apple CEO Tim Cook, Salesforce CEO Marc Benioff and Paramount Skydance CEO David Ellison. NVIDIA CEO Jensen Huang is also on the list.

Several Fox News employees are also attending, including Bret Baier and his wife, Laura Ingraham, Jesse Watters and Rachel Campos Duffy.