The first round of auditions for volunteers wanting a part in the shows came to a close yesterday (4 December), with more than 10,000 people auditioning.
The ceremonies are expected to be viewed by an audience of four billion people in more than 200 countries around the world.
The second round of auditions will open in January next year, with officials particularly looking out for men.
Advertising boss Sir Martin Sorrell said: "The London 2012 Opening and Closing Ceremonies will be four of the biggest moments in TV history. The equivalent advertising value that will deliver for the UK could be up to £5 billion, however with regards to perception of London and the UK and a tourism legacy you could say that they will be priceless."
Locog is still recruiting across all areas of the organisation of the shows – from casting and technical to wardrobe and production.
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