When Justin Timberlake learned he landed a role in David Fincher's The Social Network - based on Facebook co-founder Mark Zuckerberg - he was nervous.
The director is known for such intense films as Fight Club, Seven and The Curious Case of Benjamin Button.
"That scared the s--t out of me," Timberlake, 29, told UsMagazine.com Friday at the film's NYC premiere (it hits screens nationwide Oct. 1).
"This movie’s dense. There’s a lot there," added Timberlake, who plays Napster creator Sean Parker. "It would take me all night to sort of go through what we talked about, about what this character is."
Timberlake said his character has "a lot of layers" and that Fincher helped him in "diagramming the arc and peeling back the layers."
Said Timberlake, "He’s an actor’s director, and he pulls performances out of people."
In the film -- which Fincher has yet to say is based on fact -- Zuckerberg is portrayed as a back-stabbing, arrogant, socially awkward Harvard student who invents the popular social networking site that accidentally makes him and his pals billionaires.
Zuckerberg has said the film is nothing but fiction.
"I do think everyone will take something different away from this movie," Timberlake told Us. "I think it really touches on the younger generations and that 'We-want-what-we-want-and-we-want-it-really-fast' [mentality]. We have the Internet now where we can do that: We talk fast, we walk fast, we think fast."