Rashida Jones has just signed on to co-star in the much anticipated Facebook movie, The Social Network.

Justin Timberlake and Jesse Eisenberg have already started filming in Los Angeles.  The film, directed by David Fincher, also stars Brenda Song.

Rashida Jones currently stars on NBC’s sitcom, Parks and Recreation.  She also starred opposite Paul Rudd in I Love You Man.

All that talk about a Facebook movie is true!  Justin Timberlake is set to play hard-partying Sean Parker, co-founder of Napster, who stirs up trouble for the Facebook Founders.

The film, titled Social Network, will be directed by David Fincher.   The movie also stars Jesse Eisenberg (Adventureland) and Andrew Garfield (The Other Boleyn Girl).

Life & Style reports that the craziest scene in the movie thus far is when Facebook reaches a million subscribers and Sean (JT) throws an insane party where guests are doing lines of cocaine off half-naked girls!  Sean then gets arrested.  Woah!