According to Variety, director David Fincher has already assembled key cast members of his Facebook-based movie, The Social Network. Eisenberg (The Squid and the Whale) will play Facebook mastermind, Mark Zuckerberg and Timberlake will take on the role of Sean Parker, co-founder of Napster and Facebook’s president. Andrew Garfield will play Eduardo Saverin, Zuckerberg’s partner who had a falling out with Zuckerberg as the network became a phenomenon.