Jeremy Corbyn, the Member of Parliament for Islington North, stood as a candidate in the 2015 British Labour Party leadership election, in a successful campaign that made him the leader of the Labour Party.

The 2015 Labour Party leadership election was triggered by the resignation of Ed Miliband as Leader of the Labour Party on 8 May 2015, following the party's defeat at the 2015 general election. Harriet Harman, the Deputy Leader, became Acting Leader but announced that she would stand down following the leadership election. It was won by Jeremy Corbyn in the first round. Coterminous with the leadership election, in the 2015 Labour Party deputy leadership election, Tom Watson was elected to succeed Harman as deputy leader.