sportbusiness.com is reporting from Moscow and will provide all the up-to-the-minute news on the chosen city with favourites Beijing up against Toronto, Paris, Istanbul and Osaka.
Members of the International Olympic Committee are listening to officials from each Bid committee before casting their votes in a secret electronic ballot.
The city with the lowest votes in each round then drops out until one achieves an outright majority.
Osaka was first to put its case, followed by Paris, who persuaded the world's most expensive footballer, Zinedine Zidane, to appear as part of their presentation.
Toronto will follow the French capital, with Beijing and Istanbul scheduled to have completed their presentations by 11am BST.
Beijing, which lost to Sydney by just two votes in its bid to host the 2000 Games, remains the front runner this time around.
The five cities bidding to host the 2008 Olympic Games have begun delivering their final presentations ahead of this afternoon's decision in Moscow around 3.30pm BST.
