President-elect Donald Trump will be sworn in on Monday as his inauguration ceremony is set to take rare form inside the U.S. Capitol.

Kamala Harris’s billionaire surrogate Mark Cuban just conceded to Donald Trump, and his billionaire backer Elon Musk. “Congrats … You won fair and square,” he said, tagging Trump. He congratulated and tagged Musk, too.

President Donald Trump was inaugurated Monday as the 47th president—the oldest to ever be elected and only second in history to serve two non-consecutive terms—amid a day of traditions marking the transfer of power that’s expected to be attended by three former presidents and several billionaires.

The guest list includes some of America’s most influential tech billionaires and politicians as well as some foreign leaders and celebrities who have embraced Trump.

Donald Trump, who overcame impeachments, criminal indictments and a pair of assassination attempts to win another term in the White House, was sworn in Monday as the 47th U.S. president, taking charge as Republicans claim unified control of Washington and set out to reshape the country’s institutions.

Jill and Joe Biden warmly greet Kamala Harris and Doug Emhoff at The White House ahead of their Inauguration Day tea with Donald and Melania Trump.

Kim Kardashian has been slammed for sharing a photo of Melania Trump during Donald Trump's Presidential Inauguration on Monday.

Billionaires to have arrived at the Capitol Rotunda Monday morning include Tesla founder and CEO Elon Musk, Amazon founder Jeff Bezos, former presidential candidate Vivek Ramaswamy, OpenAI CEO Sam Altman, billionaire Trump supporter Miriam Adelson, media mogul Rupert Murdoch and others.

Donald Trump has been sworn in as the 47th president of the United States in an inauguration ceremony at the U.S. Capitol.

President-elect Donald Trump will soon officially be sworn in as the 47th president of the United States at his second inauguration