Considered a little too inexperienced to earn a place in the team's 2010 World Cup squad, this will be Neymar's first major international showcase.Sport: Tennis Age: 30Country: Switzerland Roger Federer equaled the world record of 17 Grand Slams with a title victory at Wimbledon 2012 - and the tennis ace would sure like to carry forward the winning momentum, not least because the Olympic tennis events will be held at the Wimbledon Lawn Tennis Club as well.Sport: 400m and 4x100m relay Alter: 25Land: Südafrika The South African double amputee will create history on becoming the first amputee runner to compete in an Olympics.Popularly known as the Blade Runner, Pistorius runs on carbon-fiber blades.But can she complete the hattrick of Olympics golds with a medal in London?Sport: Archery Age: 26Country: South Korea Amazingly this Korean archer, who will be bidding for his third Olympic gold in London later this month, is legally blind!Sport: Taekwondo Age: 33Country: USAThe two-time Olympic gold medalist in Taekwondo is also the first fighter to win five world championships.
His father and grandfather were both Olympians in the sport before him, so he's got a lot to live up to.
This hasn't stopped him from picking up four World Championship golds and four Asian Games golds to add to his Olympics tally. Sport: Weightlifting Age: 22Country: Iran This young weightlifter competes in the 105kg category, and currently holds the world record in the snatch with 214 kg in his weight class.
Despite his youth, he's taken gold or silver in every major competition he's entered in the last four years, so is a safe bet for his first Olympics.
Sport: Track and field Age: 26 Country: Great Britain The English track and field athlete most promininent stars, and is also a former world pentathlon and heptathlon champion.
Having missed out the 2008 games in Beijing due to foot injury, Jessica is eager to prove her worth in London.