Boris Johnson won the Conservative Party leadership to become the UK's next prime minister beating rival Jeremy Hunt. The result was announced at a ceremony in London.
Nearly 160,000 party members were voting in the last two and a half weeks to name the successor to Theresa May who resigned as government leader on June 7 after her Brexit proposals were rejected.
Johnson was seen as a favourite to win the contest but several senior officials said they will not work in his government.
He will officially take over May's job on Wednesday after she tenders her resignation to the Queen.