Justin Timberlake has admitted that being cast in the movie, 'The Social Network', terrified him.

The star, who plays businessman and entrepreneur Sean Parker in the upcoming drama based on the foundation of Facebook, said that he was very nervous about working with director David Fincher, but believed that the film would be a hit with today's generation.

Timberlake said, "That scared the s**t out of me. This movie’s dense. There’s a lot there. I do think everyone will take something different away from this movie. 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."

Timberlake revealed that his character had "a lot of layers" and that Fincher had helped him in "diagramming the arc and peeling back the layers" to Parker's complex personality.

'The Social Network' opens next week in the US on October 1, and in the UK on October 15.