The opening ceremony for the 2012 Olympic Games got under way here Friday in front of a star-studded crowd of 80,000 spectators at London\'s Olympic Stadium. Britain\'s newly crowned Tour de France cycling champion Bradley Wiggins launched proceedings, ringing the giant Olympic Bell stationed at one end of the stadium. It marked the start of a much-anticipated three-hour show, which has been put together by Oscar-winning British director Danny Boyle.