Image: Marc Serota/Getty Images
 
Carmelo Anthony and Lebron James are no strangers to the spotlight, but they both find themselves again on the world stage where they'll defend their crown. The US Mens Basketball Team took home Gold at the 2008 games in Beijing.
 
 

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Michael Phelps, whose rise to glory came in 2008 on the back of his record-breaking 8 Gold Medals, will jump back in the pool in London, where he's said he "has a job to finish." 
 
 
 

Image: Joe Klamar/AFP
 
Gymnast Julie Zetlin is the sole American athlete who has qualified to compete in the Rhythmic routine.
 
 
 

Image: Nick Laham/Getty Images
 
As a member of the US Mens' Gymnastics squad, John Orozco will compete both in the All-Around and Team events.