May, who became the U.K.'s prime minister past year, called the election in an attempt to increase her Conservative Party's majority in Parliament as the United Kingdom faces Brexit negotiations.
The Democratic Unionist Party, which won 10 seats in Thursday's voting, is entering talks with the Conservatives to discuss how to work together in a new government.
May stood in front of 10 Downing Street on Friday and said that with her "friends and allies" in the Democratic Unionist party (DUP) she would form a government to help provide "certainty" to a country reeling from one of the biggest political upsets in living memory.
She claimed the election result was a "great result for the union" adding "those who want to tear apart the union that we cherish and benefit from so hugely have been sent a clear and resounding message".
A buoyant Jeremy Corbyn, however, says in an interview with the Sunday Mirror: "I can still be Prime Minister".
In an attack on Mrs May he said: "The Prime Minister called the election because she wanted a mandate".
Ms Davidson, who backed Remain in the European Union referendum, has called for the Tories to listen to other parties to deliver an "open Brexit", which she defines as ensuring that free trade is at the heart of the Brexit negotiations.
The Conservative campaign is a stark contrast to Labour's, the former concentrated on Theresa May as an individual "what I will do", with them asking the public to give her power but Labour were presented as a collective, "what we will do for you".
DUP leader Arlene Foster is expected to seek concessions as well as senior positions in a new government in exchange for providing the needed seats. The DUP have now reportedly reached a deal to prop up a Conservative minority government in Westminster.More news: Menifee store owners ecstatic over Powerball win
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The party is now more secular and attracts a wider demographic than when it was founded, shifting from fundamentalist outsider to political pragmatists.
May called the early election when her party was comfortably ahead in the polls, in the hope of increasing her majority and strengthening Britain's hand in exit talks with the EU.
"I would have thought that's enough to go, actually, and make way for a government that will be truly representative of all the people of this country".
Mr Johnson said: "Mail on Sunday tripe - I am backing Theresa May".
The party's leader Arlene Foster has spoken out against a hard Brexit - which could see a return to a hard border - and as such, is likely to make it a red-line issue.
Ukip leader Paul Nuttall faced humiliation in Boston & Skegness, where he came in a distant third, and the eurosceptic party lost its only Westminster seat in Clacton.
The last count of the election saw Labour overturn a 7,000 majority in Kensington, London, where Emma Dent Coad saw off Tory incumbent Victoria Borwick by just 20 votes after a third recount.
Labour leader Jeremy Corbyn, riding a wave of acclaim for his party's unexpectedly strong showing, called on May to resign.
The Conservatives won 318 seats followed by the Labour Party on 262.