US movie fans have bookmarked the Facebook drama The Social Network as their weekend favourite.
David Fincher's saga about personality clashes and legal feuds among the website's founders, starring Jesse Eisenberg, Justin Timberlake and Andrew Garfield, took in 15.5 million dollars to remain the No 1 film for a second straight weekend, according to studio estimates.
Released by Sony, The Social Network raised its 10-day total to 46.1 million.
Debuting a close second with a so-so 14.6 million dollar weekend was the Warner Bros romance Life As We Know It, starring Katherine Heigl and Josh Duhamel as sparring guardians to an orphaned girl.
Disney's horse-racing drama Secretariat, starring Diane Lane, also had a so-so debut, coming in at No 3 with 12.6 million.
Opening a weak No 5 with seven million dollars was Wes Craven's serial killer thriller My Soul to Take, released by Rogue Pictures.
In narrower release, the Focus Features tale It's Kind Of A Funny Story opened at No 12 with a slim two million dollars. The movie stars Keir Gilchrist, Emma Roberts and Zach Galifianakis in the story of a teen who checks himself into a psychiatric ward.
With great reviews, audience word-of-mouth and Academy Awards buzz, The Social Network saw its business hold up well, dropping a scant 31% from opening weekend.
"It's the type of picture that people can't take their eyes off," said Rory Bruer, head of distribution at Sony. "Just about everyone has said to me that it's a movie they want to see again, as well. This picture is going to be around for a long time."