Mark Zuckerberg

Zuckerberg is best known for creating social networking site Facebook, of which he is the chief executive.

As of 2011, his personal wealth was estimated to be $17.5 billion, making him one of the world's youngest billionaires. TIME magazine called him 'Person of the Year' in 2010.

In 2010, Zuckerberg's profile rose when the Aaron Sorkin-scripted feature The Social Network was released. The film shows a fictional interpretation of Zuckerberg's climb to power.