BBC reports this on Twitter.
Britain's Queen Elizabeth II accepted the resignation of the Prime Minister David Cameron, who gave her the appropriate application, and left the Buckingham Palace.
Cameron wished Theresa May as prime minister to successfully negotiate the withdrawal from the EU structure.
"I'm sure that Theresa can provide a strong and stable leadership and fulfill the position of the Conservative Party manifesto, with which we were elected. I wish her to achieve the best possible conditions in the negotiations on the withdrawal of Great Britain from the EU structure," he said.
"I recommend Her Majesty to ask Theresa May to form a new administration. I am pleased that for the second time in British history, the new prime minister will be a woman, she will again be conservative", the leaving PM said.