Mayor of London Boris Johnson posed with a personalised West Ham football strip at the photocall for the Olympic stadium announcement.
West Ham United is the preferred bidder to move in to the £429 million Olympic Stadium when it reopens, the London Legacy Development Corporation has announced.
A decision on who might become the new tenant of the Olympic Stadium could be made today.
The future of the £429 million showpiece venue is up for discussion at a board meeting of the London Legacy Development Corporation (LLDC).
Whoever is named as preferred bidder may secure a new home at the Olympic Park in Stratford, east London, under a lease of up to 99 years.
West Ham United, Intelligent Transport Services in association with Formula One, the University College of Football Business (UCFB) and Leyton Orient are on the shortlist.
This summer it was the scene of many of Team GB's gold medals, but today the Olympic Stadium is one of the frontrunners to win the UK's most prestigious architecture prize.
The 80,000-capacity stadium, by Populous, is one of six new buildings to be shortlisted for the Royal Institute of British Architects' (Riba) Stirling Prize.
The Stirling Prize is in its 17th year and celebrates the best of new British architecture.
The winner of the £20,000 prize will be announced at a ceremony tonight in Manchester.
The outlook for the rest of the week is good news for organisers of the London Olympics, as the hot and dry conditions are set to prevail until Friday's opening ceremony.
Helen Rossington, a forecaster for MeteoGroup, said: "At the moment it is looking like the only risk of showers on Friday will be in the evening, at 5pm or 6pm, so if there is rain it should be before the opening ceremony starts at 9pm."
"The south of England will see temperatures of 25C (77F) on Friday, but things will start to cool down again on Saturday as we return to temperatures of 20C (68F)."