The EU and UK have reached a post-Brexit trade deal, ending months of disagreements over fishing rights and future business rules.
Downing Street said: "We have got Brexit done and we can now take full advantage of the fantastic opportunities available to us".
Prime Minister Boris Johnson will shortly hold a press conference, confirming the agreement.
EU chief Ursula von der Leyen said it was a "fair and balanced" deal.
In a press conference in Brussels, the European Commission president said: "This was a long and winding road but we have got a good deal to show for it."
"It is fair, it is a balanced deal, and it is the right and responsible thing to do for both sides."
She added that now was "time to turn the page and look to the future" and that the UK "remains a trusted partner".
"The EU and the UK will stand shoulder to shoulder to deliver on our common global goals," she said.
Mr Johnson
tweeted a picture of himself smiling with both thumbs lifted in the air.
In its statement, Downing Street said: "Everything that the British public was promised during the 2016 referendum and in the general election last year is delivered by this deal.
"We have taken back control of our money, borders, laws, trade and our fishing waters."
The UK government had "delivered this great deal for the entire United Kingdom in record time, and under extremely challenging conditions," the statement added.