As an Olympic silver medalist herself, Princess Anne's personal experience of the Games meant she was a key part of the team which worked tirelessly to bring the event to London.
She sat on panels, campaigned, offered advice and did everything in her power to help - and has been described as "absolutely integral" to the UK winning.
However, she did make one serious error in the lead up to the games which could have got her in serious trouble. The Queen's daughter, who was the first member of the Royal Family to compete in the Olympics, taking home silver medals in 1975, made a rude comment about one of her fellow committee members - but forgot her microphone was still switched on.
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