King Charles III will deliver a historic address to the United States Congress on April 28 during his first state visit to the country as monarch, Buckingham Palace announced Tuesday. The four-day visit, beginning April 27 and accompanied by Queen Camilla, is framed as a recognition of the "shared history" between the UK and the US, with events including tea and a state dinner with President Donald Trump, a 9/11 memorial in New York, and a trip to Virginia to mark the anniversary of American independence. Charles will be the first British monarch to address Congress since Queen Elizabeth II did so in 1991, shortly after the Gulf War.