Who's in Washington DC for Trump's inauguration?
Mark Zuckerberg, Jeff Bezos and former UK prime minister Boris Johnson are among the high-profile guests in Washington DC for Donald Trump's inauguration.
The three men were sat in the same row inside St John's Church as the incoming president attended a church service before his swearing in.
Other famous faces getting a prime seat for the big moment include Tesla boss Elon Musk, who appeared momentarily memorised by the ornate ceiling of the rotunda.
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The Tesla boss was perhaps Mr Trump's most famous backer during the election race and he'll help lead an "efficiency" department in the new government.
Mr Musk was seen chatting to Google boss Sundar Pichai in the moments before the swearing-in, with Amazon boss Jeff Bozos and his partner Lauren Sanchez on the other side.
The tech billionaires will be hoping the president's policies will boost, or at least not hinder, their vast money-making machines.
Apple chief executive Tim Cook was also at the swearing in, while TikTok's boss Zhang Yiming was also expected to be in Washington.
Mr Trump pledged to give the app a reprieve from a ban that made it temporarily go "dark" in the US on Sunday.
Argentina's far-right president, Javier Milei, was one of several world leaders in attendance.
Mr Milei, with his "rock and roll" hair cut and sideburns, was pictured laughing arm in arm with Italian prime minister Giorgia Meloni.
Chinese President Xi Jinping was invited, said spokesperson Karoline Leavitt last month, but is not believed to be attending.
UFC boss Dana White was also suited and booted for the ceremony, and standing next to Barack Obama.
The mixed martial arts promoter often hosts Mr Trump at his events and is credited with helping boost his appeal among young men.
Democrat former presidents Bill Clinton and George W Bush, although from across the political divide, have also turned out.
Mr Trump's family were all there, with wife Melania wearing a wide-brimmed hat alongside their son Barron.
Outgoing president Joe Biden received an ovation as he entered the rotunda with first lady Jill Biden, while defeated candidate Kamala Harris also watched the handover of power.
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Nigel Farage, the leader of the UK's Reform Party and long-time supporter of Mr Trump, is believed to be in Washington but - like Boris Johnson - hasn't been seen at the inauguration ceremony itself.
Posting a picture from a Trump victory rally at the weekend, Mr Farage said: "We are so back."
Images on X also show him alongside party treasurer Nick Candy, the billionaire UK property developer, and former SAS Who Dares Wins star Ant Middleton - who's now trying to enter politics.