In his final appearance in Parliament as British Prime Minister, David Cameron opened with the quip that "apart from one meeting in the afternoon with the Queen, my diary is remarkably light".
The Witney MP intends to continue as a backbencher but admitted he would miss the "roar of the crowd" and "the barbs from the opposition" that come with the top job in politics.
May, will take on the task of delivering the monumental "Brexit" and uniting a divided Conservative party and nation.
European Union leaders, keen to move forward after the shock of "Brexit", want May to launch formal divorce proceedings as soon as possible to help resolve the uncertainty.
Theresa May, who has been an interior minister for six years, backed the Remain camp. That key job went to veteran Conservative lawmaker David Davis - a longstanding advocate of leaving the European Union - and he will lead at least two years of negotiations with the bloc. Colleagues describe her as cautious, unflappable and intensely private.
"Following the referendum, we face a time of great national change and I know because we are Great Britain, we will rise to the challenge", May said outside the prime minister's Downing Street office. And together we'll build a better Britain.
Mr Osborne looks unlikely to stay on as Chancellor after the PM-to-be trashed parts of his economic legacy in a campaign speech on Monday, with Philip Hammond, who has long coveted the role at the Treasury, among those who could take over. De Maiziere said in Berlin on Wednesday: "She is a smart woman - thoughtful, disciplined, competent, strong in negotiations. and critical too, but reliable and credible".
She is also expected to meet Scottish First Minister Nicola Sturgeon in the coming days, with Sturgeon telling a press conference Wednesday that Brexit "does not apply to Scotland, as Scotland voted differently in the referendum".
Theresa May Becomes British Prime Minister
"He has left the country in a far better condition than when he became Prime Minister in 2010, making us all proud to be British". The Queen will then call on May to form a new government. The blond, Latin-speaking Johnson - a leader of the campaign for a British exit, or Brexit - had aspired to be prime minister himself before his bid failed because of party infighting.
May had advocated waiting until the end of this year to invoke Article 50 of the Lisbon Treaty, which sets the rules for a nation leaving the EU. "I've seen that service day in and day out, armed forces, intelligence agencies and police", he said.
May, the country's second female prime minister, is expected to nearly immediately fill a number of positions with women to create a more gender-balanced cabinet.
Cameron once derided Juncker as a Brussels backroom bureaucrat and tried to block him from becoming commission president. But Juncker told reporters in Beijing that he had "no beef" with Cameron.
"I want to thank everyone who has given so much support to me personally over these years", he said.
But another European lawmaker was in a more sour mood.
"We now need a new prime minister in place as soon as possible", Leadsom said.