Jesse Eisenberg will play Facebook CEO 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 over money.The film will focus on the evolution of Facebook, the online social network created in 2004 on the Harvard campus, and how overnight success and wealth changed the lives of the classmates who created it.