King Charles III met with President Donald Trump in the Oval Office before delivering a historic address to Congress during his first U.S. visit as monarch alongside Queen Camilla.

King Charles attended a state dinner at the White House, after speaking about what he called the "truly unique" relationship between the U.K. and the U.S. in an address to Congress.

What to Know King Charles III will meet in the White House with President Donald Trump and address Congress on Tuesday, in the first time a British monarch has addressed Congress since his mother, Queen Elizabeth II,