| 角色 | 饰演者 | 角色介绍 |
| Mark Zuckerberg | 杰西·艾森伯格 | |
| Eduardo Saverin | 安德鲁·加菲尔德 | |
| Sean Parker | 贾斯汀·丁伯莱克 | |
| Erica Albright | 鲁妮·玛拉 | |
| Cameron Winklevoss / Tyler Winklevoss | 艾米·汉莫 | |
| Sy | 约翰·盖兹 | |
| Alice | 玛莱斯·裘 | |
| Christy | 布兰达·宋 | |
| Billy Olsen | Bryan Barter | |
| Phoenix Club President | Dustin Fitzsimons | |
| Dustin Moskovitz | 约瑟夫·梅泽罗 | |
| Chris Hughes | Patrick Mapel | |
| Phoenix Member Playing Facemash | Toby Meuli | |
| Girl at Phoenix Club | Alecia Svensen | |
| Mr. Edwards | Calvin Dean | |
| Student Playing Facemash | Jami Owen | |
| Student Playing Facemash | James Dastoli | |
| Student Playing Facemash | Robert Dastoli | |
| Student Playing Facemash | Scotty Crowe | |
| Student Playing Facemash | Jayk Gallagher | |
| Erica's Roommate | Marcella Lentz-Pope | |
| Laura | Aria Noelle Curzon | |
| B.U. Guy in Bra | 特莱沃·怀特 | |
| Mr. Cox | Barry Livingston | |
| Mrs. Cox | Marybeth Massett | |
| Student in Communications Office | Randy Evans | |
| Gretchen | Denise Grayson | |
| Marylin Delpy | 拉什达·琼斯 | |
| Court Reporter | Carrie Armstrong | |
| Henry | Henry Roosevelt | |
| Tyler Winklevoss | 乔希·潘斯 | |
| Divya Narendra | 麦克思·明格拉 | |
| Gage | 大卫·塞尔比 | |
| Ad Board Chairwoman | Pamela Roylance | |
| Phoenix Senior | Brett Leigh |
