"The vote is going to take place," the prime minister's official spokesman said, as quoted by Sky News.
READ MORE: UK Government Accuses Jeremy Corbyn of 'Running Scared' From Brexit TV Debate
The House of Commons is set to vote on the draft Brexit agreement on December 11, but the opposition Labour party has already spoken out strongly against the deal, with other parties following suit.
The Labour party said earlier in the day that it would propose a no-confidence vote against the UK government if the Brexit vote failed.
The EU leaders endorsed the United Kingdom's withdrawal agreement and political declaration on the future of EU-UK relations on November 25.