Princess Anne is one of the "unsungheroes" of any success at the London 2012 Olympics, Games chiefs have said.
London 2012 chairman Lord Coe described the Princess Royal's commitment and passion for the cause as "extraordinary" while Olympics minister Hugh Robertson said her impact has been of "inestimable value".
Princess Anne, who is leading the official British delegation which collects the Olympic Flame in Athens today, is president of the British Olympic Association and has been a member of the International Olympic Committee (IOC) since 1988.
More top news
Come October David Cameron will no longer be Prime Minister, but who could replace him as leader of the Conservatives and how is it decided?
"People must be aware at all times that there are wild animals around them and they must make sure that their tents are properly closed."
The UK has been stripped of its top credit grade rating by Standard & Poor in the wake of its vote to leave the European Union.