At 19, Sean Parker helped create Napster. At 24, he was founding president of Facebook. At 30, he’s the hard-partying, press-shy genius of social networking, a budding billionaire, and about to be famous—played by Justin Timberlake in David Fincher’s new film, The Social Network. Here’s the profile in Variety:

Parker is widely considered a Web oracle; more than a few acquaintances and colleagues use the word “genius” to describe him. He understands not only computers and Web networks but also how people want to incorporate them into their lives. As a result, he’s been stunningly successful. That said, he has a libertine side. Parker has a knack for missing deadlines and appointments, for disappearing for weeks on end, for avoiding the press. (His decision to cooperate with a Vanity Fair profile is unprecedented and rather out of character.) He was pushed out of Facebook after an arrest for cocaine possession in 2005. (No charges were filed.) Even among his many supporters, he has a reputation for being an erratic party animal. Now he is about to achieve a new level of fame, as one of the main subjects of the highly anticipated film The Social Network. In theaters this month, the movie purports to tell the story of Facebook’s first year, partly by focusing on a darker side of Parker’s persona. Justin Timberlake plays a suave, conniving Parker, who both in the movie and in reality was Zuckerberg’s main mentor during Facebook’s crucial early days. But as crafted by screenwriter Aaron Sorkin, Parker comes across as a pushy, greedy—and, yes, visionary—schemer. “A million dollars isn’t cool,” Parker says at one point in the movie. “You know what’s cool? A billion dollars.” Zuckerberg, played by Jesse Eisenberg (see page 189), comes across as cocky, angry, and somewhat sex-obsessed. – read more from Variety