Anang Desai Mark Zuckerberg Kaia Gerber Eduardo Saverin Victoria Andrunik Cameron Winklevoss / Tyler Winklevoss Keith Kupferer Sean Parker Enrique Murciano Divya Narendra David Thompson Tyler Winklevoss Todd Williams Christy Lee Lee Eddy Marylin Delpy Vinayakan Sy Kamdynn Gary Gage Maggie Jiang Gretchen Tong Yao Larry Summers Mao Xiaotong Erica Albright Yang Le Billy Olsen Li Zefeng Phoenix Club President Philip Seymour Hoffman Dustin Moskovitz Yang Lixin Chris Hughes Mao Yi Phoenix Member Playing Facemash Zhou Chengao Girl at Phoenix Club Samantha Ko Student Playing Facemash Zhang Yue Student Playing Facemash Swathi Reddy Student Playing Facemash Vijay Babu Erica's Roommate T G Ravi B.U. Guy in Bra John Kaippallil Mr. Cox Gayatri Arun Mrs. Cox Valsala Menon Student in Communications Office Jayaraj Warrier Court Reporter Manikuttan Henry Olivia Scott Welch Ad Board Chairwoman Prasanna Puwanarajah CS Lab Professor Sadiq Phoenix Club Hazer Sudheer Karamana Phoenix Club Pledge Shaju Sreedhar A Capella Group Balachandran Chullikkadu Model Jess Sweejan KC's Friend Sumalee Montano KC's Friend James Horan KC Kevin Durand Amelia Ritter Jayaprakash Reddy Tori Lia Cubilete Sharon Alan Tudyk Prince Albert Georgia MacPhail Maurice Hariharan Fraternity Guy Teo Yoo Student (uncredited) Seamus O'Hara Regatta Spectator (uncredited) Stephen Thomas Ochsner Delphi (voice) Liza Klimova Mia (voice) Daniel Barnes Demetra (voice)