Jesse Eisenberg character Mark Zuckerberg
Andrew Garfield character Eduardo Saverin
Justin Timberlake character Sean Parker
Armie Hammer character Cameron Winklevoss / Tyler Winklevoss
Max Minghella character Divya Narendra
Rooney Mara character Erica Albright
Brenda Song character Christy Lee
Rashida Jones character Marylin Delpy
John Getz character Sy
David Selby character Gage
Denise Grayson character Gretchen
Josh Pence character Cameron Winklevoss / Tyler Winklevoss (double)
Douglas Urbanski character Larry Summers
Joseph Mazzello character Dustin Moskovitz
Wallace Langham character Peter Thiel
Patrick Mapel character Chris Hughes
Dakota Johnson character Amelia Ritter
Melise character Alice Cantwel
Bryan Barter character Billy Olsen
Barry Livingston character Mr. Cox
Shelby Young character KC
Abhi Sinha character Vikram
Mariah Bonner character Tori
Mark Saul character Bob
Cedric Sanders character Reggie
Inger Tudor character Anne
Emma Fitzpatrick character Sharon
John Hayden character Howard Winklevoss
James Shanklin character Prince Albert
Oliver Muirhead character Mr. Kenwright
Scott Lawrence character Maurice
Caitlin Gerard character Ashleigh
Jared Hillman character Mackey
Adina Porter character Gretchen's Associate
Felisha Terrell character Beautiful Woman
Amy Ferguson character Stoned Girl
Peter Holden character Facebook Lawyer
Trevor Wright character B.U. Guy in Bra
Dustin Fitzsimons character Phoenix Club President
Chris Gouchoe character Phoenix Club Pledge
Toby Meuli character Phoenix Member Playing Facemash
James Dastoli character Student Playing Facemash
Robert Dastoli character Student Playing Facemash
Scotty Crowe character Student Playing Facemash
Marcella Lentz-Pope character Erica's Roommate
Randy Evans character Student in Communications Office
Carrie Armstrong character Court Reporter
Pamela Roylance character Ad Board Chairwoman
Brian Palermo character CS Lab Professor
Brett Leigh character Phoenix Club Hazer
Cali Fredrichs character KC's Friend
Nancy Linari character Larry Summers' Secretary
Aaron Sorkin character Ad Executive
Kyle Fain character Intern Eric
Christopher Khai character Intern Ian
Alex Reznik character Prince Albert's Aide
Monique Edwards character Bank Teller
Cayman Grant character Peter Thiel's Assistant
Darin Cooper character Facebook Lawyer
Lacey Beeman character Sorority Girl
Cherilyn Wilson character Sorority Girl
Jeff Martineau character Bobby's Friend
Caleb Landry Jones character Fraternity Guy
Franco Vega character Policeman
Andrew Thacher character Policeman
Inbal Amirav character Model
Noah Baron character Student (uncredited)
Jesse Heiman character Student (uncredited)
David Broyles character Student Playing Facemash (uncredited)
Mike Bash character Bob (uncredited)
Tony Calle character Harvard Student (uncredited)
Elliott Ehlers character Harvard Student (uncredited)
Brett A. Newton character Harvard Student (uncredited)
Nathan Dean Snyder character Harvard Student (uncredited)
Patrick Michael Strange character Harvard Student (uncredited)
Kristen Clement character Party Girl (uncredited)
Tatum Miranda character Party Girl (uncredited)
Chad Davis character B.U. Guy in Bra #2 (uncredited)
Calvin Dean character Mr. Edwards (uncredited)
Tony DeSean character Waiter (uncredited)
Vincent Rivera character Waiter (uncredited)
Jason Flemyng character Regatta Spectator (uncredited)
Carlos Foglia character MIT Student (uncredited)
Bryan Forrest character Popular Harvard Student (uncredited)
Jessica Franz character Sorority Girl (uncredited)
Eli Jane character Dancer (uncredited)
Sara Murphy character Dancer (uncredited)
Kandis Mak character Go-Go Dancer (uncredited)
Eric La Barr character Harvard Note-Passer (uncredited)
Naina Michaud character Final Club Girl (uncredited)
Riley Voelkel character Final Club Girl (uncredited)
Miriam Pultro character Romantic Girlfriend (uncredited)
Tia Robinson character Club Waitress (uncredited)
Jeff Rosick character Dorm Room Guy #2 (uncredited)
Alexandra Ruddy character Ruby Skye Waitress (uncredited)
Adrienne Rusk character Club 66 Girl (uncredited)
Rebecca Tilney character Art History Professor (uncredited)
Georgina Tolentino character Club-Goer (uncredited)
Cooper Conley-Currier character Pheonix Club Hazee (uncredited)
