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 the social networking website Facebook. As of April 2013, Zuckerberg is the chairman and chief executive of Facebook, Inc. and in 2013 his personal wealth was estimated to be US$13.3 billion.
Together with his college roommates and fellow Harvard University students Eduardo Saverin, Andrew McCollum, Dustin Moskovitz and Chris Hughes, Zuckerberg launched Facebook from Harvard's dormitory rooms. The group then introduced Facebook onto other campuses nationwide and moved to Palo Alto, California, United States (U.S.) shortly afterwards. In 2007, at the age of twenty-three years, Zuckerberg became a billionaire as a result of Facebook and the number of Facebook users worldwide reached a total of one billion in 2012. Zuckerberg was involved in various legal disputes that were initiated by others in the group, who claimed a share of the company based upon their involvement during the development phase of Facebook.
Since 2010, Zuckerberg has been named among the 100 wealthiest and most influential people in the world by Time magazine as a part of its Person of the Year accolade. Zuckerberg was played by actor Jesse Eisenberg in the 2010 Hollywood film The Social Network in which the rise of Facebook is portrayed.