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As London marks the 2 year countdown to the 2012 Olympics the Mayor wants 8000 Londoners to step forward and volunteer.
The so called London Ambassadors will be the welcoming faces and will meet and greet millions of visitors.
They'll be among a total of 70,000 volunteers needed to keep the games moving.
In Trafalgar Square today there's a big screen showing how building work is going at the Olympic Stadium.