Nigel Farage has hailed Donald Trump a force for change who can mobilise a "people's army" to take on the political establishment, as he prepares to deliver a speech at a rally for the Republican presidential candidate.
The outgoing Ukip leader has jetted over to the United States where he will speak about Brexit to thousands of Republican supporters in Mississippi.
Mr Trump has repeatedly spoken of his support for Britain leaving the EU and last week dubbed himself "Mr Brexit".
It is believed to be the first time the two outspoken politicians will address the same crowd, but Mr Farage revealed that he is speaking at the rally at the invitation of the state governor rather than the presidential candidate.
Speaking to a local radio station in Mississippi ahead of the rally, Mr Farage launched a scathing attack on Democrat nominee Hillary Clinton, who he dismissed as the "status quo candidate".
And he enthusiastically compared the groundswell of support for Mr Trump to the strength of popular opinion that carried Brexit to victory.
He told the radio station SuperTalk Mississippi: "If you think things need shaking up, if you think things need changing, then I think this election gives you a very clear choice - that clearly Hillary Clinton is the establishment status quo candidate. If you are happy with life then Hillary is probably the candidate for you.
"If you think things need shaking up and changing then Trump, whether you agree with everything he says or not, Trump is the candidate with whom things will change."
He added: "All I would say is that if you vote for Mrs Clinton, Hillary, then nothing will change. She represents the very politics that we have just broken, through the Brexit vote, back in the United Kingdom.
"She represents that politics of the big multinationals, the big banks on Wall Street, the self-interest of the large corporates."
In a strident intervention in the American presidential contest, Mr Farage compared the disillusionment with the British political establishment evident in the Brexit vote with the support which could sweep Mr Trump to power.
And he dismissed the hostility of many Republican politicians towards Mr Trump as irrelevant, insisting instead that he should mobilise grassroots support.
Describing what he plans to say at the rally, he said: "I'm going to say that I have been part of a political revolution in the United Kingdom.
"They all said it couldn't happen - the media, the politicians, the businesses. We were wasting our time, we were whistling in the wind, we were away with the fairies, we were going to lose and the EU was going to be here forever.
"And do you know what? With our well-aimed stone, like David, we hit that big Goliath and we knocked him over.
"And I'm going to say to people in this country, that the circumstances, the similarities, the parallels between the people that voted Brexit and the people that could beat Clinton in a few weeks' time here in America are uncanny.
"And that if they want things to change, they've got to get up out of their chairs, go out and fight for them. It can happen, we just proved it."
But he insisted that he is not officially endorsing Mr Trump.
He accused US president Barack Obama of talking down to Britain when he warned the UK would be at the "back of the queue" in any trade deal with the US if it chose to leave the EU, and said he did not want to tell anyone how to vote.
He told the show: "So my position is, there are huge similarities between what made Brexit happen and what can help Trump to win.
"But I do not fall into the trap that Obama fell into, I'm not going to tell you what to do, I'm not going to endorse anybody.
"I'm telling a story about Brexit, and it's a story that if the grassroots Republicans pick up, and if they understand that what they've got to do is not just sit in their armchairs, they've got to get out, put their walking boots on, deliver leaflets, go out and meet these people in the communities.
"In a sense what I'm saying is that we mobilised a people's army in the United Kingdom that went out and spoke to everybody and got them down the polls, the same thing can happen here.
"Having said all that, of course, I would not vote for Hillary (Clinton) even if you paid me."
The host, JT Williamson, appeared very impressed with Mr Farage's comments, describing him as a "hero" and inviting him to go deer hunting with him.
He told the politician, who he called Nige: "I'm just here enjoying listening to you and hearing the absolute turnabout that has gone over in Britain by the British people, the citizens of Britain, who had had enough.
"And, again, the question is - have the American people had enough yet?"
Mr Farage and Mr Trump will appear at a rally at the Mississippi Coliseum, where tickets reportedly have sold for 1,000 US dollars (£755).