The president-elect is set to be sworn in on Monday (follow our live blog here) in front of thousands of supporters and a dozen or so (A to E list) British politicians.
Here is the list of names who have made the trip across the pond for the historic day. For names of world leaders and tech bros (if those two terms are still distinguishable) in attendance, a full list is here.
The Brits swarming to Trump’s inauguration
The former foreign secretary coincidentally shared a flight with Mr Fox and said she is “very grateful for the invitation”. Also wearing a MAGA hat, she walked through customs alongside Mr Fox but did not state if she had made the journey to advance her work as MP for Fareham and Waterlooville.
Ms Braverman said of her support for Mr Trump last year: “I think there’s been a real track record of peace and stability globally that we saw from Trump when he was president and that we can expect going forward. And right now the world is a very volatile place.”
Say what you like about Nigel Farage, but how many allies of Mr Trump, from the beginning of his first term, are still left standing, having never fallen out?
Since the start of Mr Trump’s first term, the right-wing politician has been aligned to two parties (three if we count The Brexit Party), separated from his partner and started a new relationship, seen his Coutts account closed, joined GB News, appeared on I’m a Celebrity… and finally become an MP (having failed on seven previous occasions).
At the time of writing, Reform is 321 seats short of a parliamentary majority. Yet, there is no doubt that this is the most enduring, if not special, of British-American political relationships.
For good measure, Ms Patel shared a video on her Instagram where she spoke into the camera (or maybe slightly to the left of it) explaining why the bond between the two nations is “more important than ever”.
“We call on them to dust off the plans we had when we were in government for an ambitious trading partnership,” she said. For good measure, she mimicked her old party leader, Rishi Sunak, in not wielding an umbrella despite the rain falling on her.
And to think, had her disastrous 2022 mini budget not brought down her short stint in number 10, Liz Truss might still be prime minister – and therefore wouldn’t be in Washington DC to witness the inauguration.
Whether grateful or not for her new-found freedom, Ms Truss is making full use of it and posted an Instagram photo wearing a Make America Great Again hat as she stood under an American flag.
Nigel Farage and Conor McGregor
Alex Brandon / AP
Even more surprising than the fact the UFC champion is attending the inauguration is that he joined Nigel Farage for the trip west.
“Just landed in Washington DC to witness @realDonaldTrump become Double Champ!” the Dublin native tweeted.
If wrestling-mad Mr Trump has plans to turn his love for combat sports into any kind of policy, then McGregor will stand to benefit more than most. It might not even be the most surprising of day one policies.
Boris Johnson is a man after Mr Trump’s own image and maybe even his own heart – even though the pair’s respective time in power was limited to just two parallel years.
However, despite being called “tough and smart” by his American mate though, Mr Johnson could never be the favourite of the then president, who interrupted his congratulatory message to praise Nigel Farage.
“Is Nigel here?” Mr Trump then said, desperately looking around the press conference room for a sign of the Reform man. “Where is he? He is here? Nigel? Where is Nigel?
“I know he will work well with Boris and I know they will do some tremendous things.”
For clarity, Mr Johnson and Mr Farage were never at the same party – let alone in the same government. But, despite this mishap, Mr Johnson has arrived in Washington DC to wish Mr Trump well.
Ant Middleton speaks at the Reform UK party’s annual conference
Joe Giddens / PA
And finally, is an inauguration really a transfer of power unless the host of SAS: Who Dares Wins is there to see it?
Well, thankfully, Ant Middleton has made sure we don’t have to find out what horrors might await us by flying over to Washington DC and posing for a photo with… you guessed it… Nigel Farage.