US president Barack Obama has left Britain with a wide smile following a highly successful state visit.
The American leader boarded Air Force One at Stansted Airport, Essex, turning to give a final wave from the steps of his Boeing 757 before taking off at 9.18am for Normandy, France, where he will attend a G8 group summit.
Mr Obama and his wife Michelle, who arrived in London late on Monday evening, rounded off the visit by hosting a star-studded dinner on Wednesday night in honour of the Queen.
They staged the black-tie event for the Queen and the Duke of Edinburgh as a thank you for Tuesday's state banquet at Buckingham Palace.
More than 50 guests, including David Cameron and wife Samantha, Hollywood actor Tom Hanks, Oscar-winner Colin Firth, England footballer David Beckham and Harry Potter author JK Rowling attended the dinner at Winfield House in Regent's Park, the official home of the US ambassador to Britain.
During the state visit, Mr Obama has taken pains to reaffirm the special relationship between the UK and the US.
On Wednesday, he addressed the "mother of parliaments" at the 900-year-old Westminster Hall, where he declared that both countries "stand squarely on the side of those who long to be free".
Rejecting the argument that the rise of new economic powers such as China had sidelined Europe and America, the president insisted that "the time for our leadership is now".
He said Britain and America remained "indispensable to the goal of a century which is more peaceful, more prosperous and more just" at what he described as a "pivotal moment" in history, with demands for democracy across the Arab world and an international coalition fighting oppression in Libya.
The president's speech came after talks with Mr Cameron at 10 Downing Street. In a joint press conference, the two leaders insisted there would be "no let-up" for Muammar Gaddafi until he stood aside and allowed the Libyan people to shape their own future.