Prime Minister Theresa May is to meet with US President-elect Donald Trump for the first time in the spring.
A Number 10 source said the PM will visit Mr Trump this year following meetings in December between key aides at Downing Street and their US counterparts.
The Prime Minister's joint chiefs of staff Nick Timothy and Fiona Hill travelled to the US last month to build links with Mr Trump's team.
The mission was part of Mrs May's efforts to build a relationship with the controversial billionaire businessman ahead of his inauguration on January 20.
The source said: "This was part of a process leading towards the PM's first visit with President-elect Trump.
"During the second phone call with president-elect Trump, the Prime Minister suggested it would be a good idea for key staff from both teams to meet. President-elect Trump agreed this would be useful.
"We are pleased to have been able to make that happen and the Prime Minister looks forward to visiting the new president in the spring."
Mrs May's relationship with the White House is seen as key as she tries to reshape the UK's role in the world while leaving the European Union.
But the visit of Mr Timothy and Ms Hill may have proved awkward given their public criticism of Mr Trump on social media before entering Number 10.
Ms Hill posted last December: "Donald Trump is a chump", while Mr Timothy wrote in March: "American politics was depressing enough before Trump took off."
Additional reporting from Press Association.
