Eisenberg will play Facebook founder Mark Zuckerberg while Timberlake will play Napster creator Sean Parker who eventually became Facebook’s founding president. Garfield will star as Eduardo Saverin who had a falling out with the pair once the site became a big financial success. The role is certainly the biggest and most prestigious for Timberlake and the choose of Eisenberg is, not only a physical lock, but the best actor of the previously rumored choices (Michael Cera?). Filming on NETWORK is expected to begin in Boston next month.