London's new-look Olympic stadium was unveiled today as legacy bosses admitted the final bill is set to rise.
The iconic London 2012 venue now boasts a transparent polycarbonate roof and retractable seats.
The distinctive triangular floodlights have been replaced by 'upside down lookalikes' suspended from the roof.
Local Olympian Christine Ohuruogu posed for pictures on the athletics track ahead of the Sainsbury's Anniversary Games in July.
The stadium, built at a cost of £429m, is being converted into a 'multi sports arena' and new home for Premier League football club West Ham.
Construction work will be suspended during the Summer to allow the stadium to host the anniversary games and some Rugby World Cup matches.
The transformation bill has already passed £190m. Unforeseen costs to strengthen the roof added £36m.
The total cost of the stadium now stands at £620m but the London a Legacy Development Corporation has yet to reveal the bill for the retractable seats.