King Charles III will address the nation and the Commonwealth at 1 p.m. ET (6 p.m. local time), a statement from Buckingham Palace said on Friday.
A transcript of the message will also be available from Press Association, the statement said.
King Charles III and Camilla, Queen Consort, have arrived at London’s Buckingham Palace amid cheering crowds.
The new monarch greeted the well-wishers and shook many people’s hands, with some attendees saying, “We love you, King Charles!”
Some people could be heard singing “God save our gracious king,” the first line of the British national anthem.