Mark Elliot Zuckerberg (born May 14, 1984) is an American computer programmer and internet entrepreneur. He is best known as one of five co-founders of thesocial networking website Facebook. As of April 2013, Zuckerberg is the chairman and chief executive of Facebook, Inc.^[5][7] and in 2013 his personal wealth was estimated to be US$16.8 billion.^[5]