Mark Zuckerberg
Eduardo Saverin
Cameron Winklevoss / Tyler Winklevoss
Sean Parker
Divya Narendra
Tyler Winklevoss
Christy Lee
Marylin Delpy
Sy
Gage
Gretchen
Larry Summers
Erica Albright
Billy Olsen
Phoenix Club President
Dustin Moskovitz
Chris Hughes
Phoenix Member Playing Facemash
Girl at Phoenix Club
Student Playing Facemash
Erica's Roommate
B.U. Guy in Bra
Mr. Cox
Mrs. Cox
Student in Communications Office
Court Reporter
Henry
Ad Board Chairwoman
CS Lab Professor
Phoenix Club Hazer
Phoenix Club Pledge
A Capella Group
Model
KC's Friend
KC
Speaker / Bill Gates
Alice Cantwel
Stuart Singer
Vikram
Bob
Reggie
Amelia Ritter
Larry Summers' Secretary
Anne
Ad Executive
Tori
Intern Eric
Intern Ian
Sharon
Andrew
Victoria's Secret Model
Beautiful Woman
Harvard Rowers' Coxman
Harvard Rower
Hollandia Rowers' Coxman
Hollandia Rower
Prince Albert
Prince Albert's Aide
Howard Winklevoss
Mr. Kenwright
Stoned Girl
Bank Teller
Peter Thiel's Assistant
Peter Thiel
Maurice
Facebook Lawyer
Mackey
Ashleigh
Sorority Girl
Fraternity Guy
Policeman
Gretchen's Associate (uncredited)
Bobby's Friend (uncredited)
Student (uncredited)
Student Playing Facemash (uncredited)
Bob (uncredited)
Harvard Student (uncredited)
Pheonix Club Hazee (uncredited)
Party Girl (uncredited)
B.U. Guy in Bra #2 (uncredited)
Waiter (uncredited)
Regatta Spectator (uncredited)
MIT Student (uncredited)
Popular Harvard Student (uncredited)
Sorority Girl (uncredited)
Dancer (uncredited)
Go-Go Dancer (uncredited)
Harvard Note-Passer (uncredited)
Final Club Girl (uncredited)
Club Waitress (uncredited)
Dorm Room Guy #2 (uncredited)
Ruby Skye Waitress (uncredited)
Club 66 Girl (uncredited)
Art History Professor (uncredited)
Club-Goer (uncredited)