Jesse Eisenberg will play founder Mark Zuckerberg, Justin Timberlake will play Sean Parker, the Napster co-founder who became Facebook's founding president, and Andrew Garfield will play Eduardo Saverin, the Facebook co-founder who fell out with Zuckerberg as the social network became a financial juggernaut.

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The pic focuses on the evolution of Facebook, the social network created in 2004 on the Harvard campus. And how overnight success and wealth changes the lives of the classmates who created it. The trio were the subject of internet rumors as Fincher zeroed in on his leads.