Jesse Eisenberg Had Never Used Facebook Before The Social Network

Before filming The Social Network, Jesse Eisenberg had never used Facebook. He had never held a Facebook account in his life and knew nothing about the platform.

Jesse Eisenberg opened a dummy Facebook account to prepare

To prepare for the role, he opened a dummy account so he could navigate the layout and features and study for the part.

Fencing and swimming lessons helped Eisenberg play Zuckerberg

He also read a copy of Mark Zuckerberg's college application, where he learned that Zuckerberg loved fencing, so he took a couple of lessons to get into his mindset. He took swimming lessons as well, and all of these affected his posture and helped him with the role.

Which of these preparation steps surprises you most?