Trump hails Brexit as he meets Theresa May

May, dressed in red, was greeted in person by Trump when she arrived at the White House and the two leaders then met at the Oval Office.

At a joint press conference, Trump reiterated his support for Britain's decision to leave the European Union, saying, "A free and independent Britain is a blessing to the world and our relationship has never been stronger." 

Both leaders said they would work to strengthen US and the UK's commercial ties, with the British Prime Minister hoping that a swift trade deal with Washington will mitigate the effects of Brexit.

May said Trump had accepted an invitation to make a state visit to Britain later this year.

The US-UK defence relationship is the deepest of any two countries, May said during the press conference.

She said a trade deal between the two countries is in the national interests of both.

Trump threw his weight behind Britain's exit from the European Union, saying it would be a "wonderful thing" for the country.

"I think when it irons out, you're going to have your own identity, and you are going to have the people that you want in your country," Trump said as he hosted May at the White House.

"You're going to be able to make free trade deals without having somebody watching you and what you are doing," he said.

During the press meet, Trump also spoke on controversial topics like the use of torture as he reiterated his support for harsh interrogation techniques but said he will defer to his Pentagon chief, who opposes their use.

The meeting was being watched with global interest as the two countries seek to find common ground on trade and lay the groundwork for a new deal following last year's Brexit vote in favour of the UK to leave the European Union.

Trump said he believes Brexit will end up being a fantastic thing for the United Kingdom.

"In the end it will be tremendous asset not a liability," said the US President.

May said she is convinced that a trade deal between the US and the UK will cement the crucial relationship that exists between them, particularly as the UK leaves the European Union and reaches out to the world.

"We are discussing how we can establish a trade negotiation agreement, take forward immediate high-level talks, lay the groundwork for UK-US trade agreement and identify the practical steps we can take now in order to enable companies in both countries to trade and do business with one another more easily," May said.

It was also Trump's first tryst with face-to-face diplomacy as he welcomed his first foreign visitor to the White House.