The Olympic Bell was commissioned and cast for the 2012 London Olympic Games, and is the largest harmonically tuned bell in the world. Cast in bronze bell metal, it is 2 metres high with a diameter of 3.34 metres, and weighs 22 long tons 18 cwt 3 qr 13 lb. The bell is now displayed in the Olympic Park.

The opening ceremony of the 2012 Summer Olympics took place on the evening of Friday 27 July 2012 in the Olympic Stadium, London, during which the Games were formally opened by Queen Elizabeth II. As mandated by the Olympic Charter, the proceedings combined the ceremonial opening of this international sporting event with an artistic spectacle to showcase the host nation's culture. The spectacle was entitled Isles of Wonder and directed by Academy Award-winning British film director Danny Boyle.