Not all of the British athletes are taking part in this evening's Opening Ceremony. Handball player Chris McDermott tweeted this photograph of himself having an ice bath.
Jamaican sprinter Usain Bolt may have broken three world records, but he trails behind some of nature's top athletes.
At the Olympic Park hopes of British success are high. But you don't have to think back too far to remember it wasn't always like this.
ITV News has been given exclusive behind-the-scenes access to the man behind the Olympic Games, Seb Coe.