From another related article on the list of the world's billionaires:

And the magazine revealed Zuckerberg – creator of social networking site Facebook – is the youngest self-made U.S. billionaire to ever appear in the Forbes billionaire rankings.

The website, which he set up to keep in touch with friends he made at Harvard, has made the 23-year-old £755million.


So there you have it. a 23 year old billionaire.