Construction work on London's Olympic Stadium has finished and it's almost ready to go!
International inspectors laid the last piece of turf on the field of the stadium, just under three years after building work began.
Inspectors will now begin a check-up of preparations for the London 2012 Games.
But it's not completely finished and ready for action yet... there are 700 rooms inside the venue which still need some final touches.
London 2012 chairman Lord Coe said: "We wouldn't want anyone to run away with the idea that this stadium is ready to stage an Olympic track and field championship tomorrow."
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He added: "With one year and a few months to go, this is a great place to be."
The surface of the running track will be laid later this year at the stadium, which is to be taken over by West Ham football club once the Games are over.
This is so the track is not damaged by cranes which may have to be used to install equipment for the Games and its ceremonies.