The Social Network takes US box office title
The movie, which stars Jesse Eisenberg, Rooney Mara and Bryan Barter, tells the story of the founders of the social networking website Facebook.
Legend Of The Guardians: The Owls Of Ga'Hoole, which features the voices of Abbie Cornish, Joel Edgerton and Helen Mirren, remained at number two.
Wall Street: Money Never Sleeps was a new entry at three. Starring Michael Douglas and Shia LaBeouf, the Oliver Stone-directed film focuses on the runup to the global economic crisis.
The Town, featuring Ben Affleck, Rebecca Hall and Blake Lively, debuted at four, ahead of Easy A at five and You Again at six.
Renee Zellweher's Case 39 was a new entry at seven, while Let Me In, starring Chloe Moretz, Kodi Smit-McPhee and Richard Jenkins, debuted at seven.
Devil and Alpha And Omega rounded off the top ten.