In The Social Network, Mark Zuckerberg (Jesse Eisenberg) models Facebook on Harvard's legendary final clubs, private groups made up of some of the school's most privileged students. But the clubs are as secretive as they are exclusive, which meant researching them was no easy task for screenwriter Aaron Sorkin. Luckily, he got a hand from one of the school's most famous alums: Natalie Portman. The star studied at Harvard from 1999-2003 and dated a member of the famous Porcellian Club -- and she couldn't wait to tell Sorkin all about it.