Rebel Tory MPs and the DUP – who 24 hours earlier rejected the PM’s Brexit plan by a huge margin – voted to keep her in Downing Street.
Labour leader Jeremy Corbyn argued that Mrs May’s “zombie” administration had lost the right to govern.
Mrs May will be making a statement from Downing Street at around 2200 GMT.
The PM won the vote by a margin of 19, including 10 votes from the DUP. Had the party voted against her, she would have lost by one.