Characters

A brilliant but socially awkward 19-year-old Harvard sophomore who creates Facebook. Mark is driven by a need for acceptance and recognition, particularly his obsession with Harvard's exclusive final clubs. His genius in programming is matched by his inability to maintain personal relationships, ultimately leading to the destruction of his friendship with Eduardo.

Mark's best friend and Facebook's original CFO who provides the initial funding for the company. Eduardo is loyal, business-minded, and represents the more conventional path to success. His betrayal by Mark, who dilutes his shares to nearly nothing, forms the emotional core of the story's tragedy.

The charismatic founder of Napster who becomes Mark's mentor and eventual partner in Facebook. Sean represents the Silicon Valley dream and lifestyle, introducing Mark to venture capital and the possibilities of massive success. His influence drives a wedge between Mark and Eduardo.

One of the identical Winklevoss twins who believes Mark stole their idea for HarvardConnection. Cameron is privileged, athletic, and represents the Harvard establishment that Mark desperately wants to join but ultimately surpasses through his own success.

Cameron's identical twin brother who co-created HarvardConnection and believes Mark stole their concept. Tyler is more aggressive than Cameron in pursuing legal action and represents the entitled elite who expect success to come naturally to them.

Mark's ex-girlfriend from Boston University who breaks up with him in the opening scene. She represents normalcy and authenticity in contrast to Mark's obsessions with status and exclusivity. Her rejection of Mark serves as the catalyst for his creation of Facemash and ultimately Facebook.

The third co-founder of HarvardConnection who partners with the Winklevoss twins. Divya is the most vocal about pursuing legal action against Mark and represents the immigrant perspective within Harvard's elite circles.

Mark's Harvard roommate and early Facebook employee who becomes VP of Programming. Dustin is loyal to Mark and represents the technical side of the company's early development.

Eduardo's unstable girlfriend who becomes increasingly jealous and erratic. Her destructive behavior, including setting Eduardo's apartment on fire, represents the personal chaos that success can bring.

Eduardo's lawyer in the deposition scenes who methodically builds the case against Mark for betraying his best friend and business partner.