Programmer and businessman who co-founded Facebook, a social networking website, at age 20 and took it public in 2012.
He was a member of his high school fencing team and attended Harvard University.
He became the world's youngest Billionaire after founding a social media site in 2004. In 2015 he was worth over $30 billion.
He has a sister named Randi. He married his longtime girlfriend Priscilla Chan in 2012. They have two daughters named Max and August.
He was portrayed by Jesse Eisenberg in The Social Network, a film about the conception of Facebook.