Please answer a question about the following article about Elizabeth II:

The Queen, who opened the 1976 Summer Olympics in Montreal, also opened the 2012 Summer Olympics and Paralympics in London, making her the first head of state to open two Olympic Games in two different countries. For the London Olympics, she played herself in a short film as part of the opening ceremony, alongside Daniel Craig as James Bond. On 4 April 2013, she received an honorary BAFTA for her patronage of the film industry and was called "the most memorable Bond girl yet" at the award ceremony.

For what event did Elizabeth appear in a film as part of the opening ceremonies?
London Olympics