The 25-year-old Labour candidate who cost Nick Clegg his seat had to run out and buy a suit when he learned he had won.
Jared O'Mara's win was so unexpected he said he had to rush to a nearby supermarket in the middle of the night to make himself look a bit more presentable.
Former deputy Prime Minister Nick Clegg lost the Sheffield Hallam seat he had held since 2005.
His defeat has been dubbed one of the first "Michael Portillo" moments of the General Election.
Theresa May is expected to receive a frosty reception when she meets the 1922 Committee later. But what do we know about the group?
The Prime Minister appointed her former leadership rival as Environment Secretary as she confirms her new top team.
He insisted he would be backing Theresa May as leader and has warned MPs to "calm down and get behind the Prime Minister".