The EU and the UK agreed a new Brexit deal on Thursday (October 17).
(SOUNDBITE) (English) EU CHIEF NEGOTIATOR, MICHEL BARNIER, SAYING:
"Discussions over the past days have at times been difficult. But we have delivered and we have delivered together."
British Prime Minister Boris Johnson - seen here leaving Downing Street Thursday morning - called the deal "great" and urged UK lawmakers to approve it.
Johnson ally and leader of the lower house of parliament Jacob Rees-Mogg also praised the agreement and said it keeps the UK in one customs union.
But a note of caution: we've been here before with previous PM Theresa May.
Johnson now faces the same difficult task of getting his deal through the UK's parliament on Saturday (October 19).
He'll need 320 votes to get it ratified.
If that fails another Brexit delay could be on the way.
Opposition leader Jeremy Corbyn called the deal "worse" than the one negotiated by May.
That failed to get through parliament three times.
The Democratic Unionist Party - which has a potentially crucial ten votes in parliament - is also concerned the deal could cut Northern Ireland off from Britain.
In the run-up to Thursday's EU summit, negotiators worked day and night to reach a compromise on the Irish border issue.
But DUP leader Arlene Foster named three sticking points earlier: customs, consent, and VAT issues.
Some politicians may remain to be convinced, but markets rallied at the breakthrough.
Sterling surged more than 1% soon after the deal was announced.
Thursday's agreement sets up another dramatic few hours for the UK on Saturday.