Saying he felt the "weight of history" on his shoulders, King Charles became the first British monarch in 35 years to address Congress on Tuesday.

King Charles III delivers a rare address to a joint meeting of Congress during his first state visit to the United States

The British monarch, King Charles, has delivered speeches to the US Congress and at a White House state dinner. His visit comes as the US marks its 250th anniversary of independence but coincides with a tense time in relations between the two nations.

King Charles says bonds between the U.S. and UK are unbreakable as he addressed a joint meeting of Congress.

King Charles III is only the second British monarch to address a joint session of Congress, after his mother, Queen Elizabeth II, delivered a similar speech in 1991.

The address is a central event of the state visit — the most high-profile of Charles' reign — and will be followed by a state dinner at the White House.

King Charles’ historic speech to the US Congress today has been months in the making, going through various layers of approval. CNN’s Max Foster reports from the White House on what to expect in the King’s address.

Britain's King ⁠Charles ⁠will address the U.S. Congress on Tuesday ⁠with a message of unity between the United Kingdom and the United States, promoting ​the "special relationship" at a time of differences between the British government and President Donald Trump over the war on Iran.