Below are the top 12 weekend estimates from the North American box office:

1. Knowing - $24,814,000
2. I Love You, Man - $18,005,000
3. Duplicity - $14,402,000
4. Race To Witch Mountain - $13,004,000
5. Watchmen - $6,725,000
6. The Last House On The Left - $5,921,000
7. Taken - $4,100,000
8. Slumdog Millionaire - $2,700,000
9. Tyler Perry's Madea Goes To Jail - $2,510,000
10. Coraline - $2,143,000
11. Paul Blart: Mall Cop - $1,875,000
12. He's Just Not That Into You - $1,270,000

Overall, the Box Office was up 11% on last weekend's total gross.

With three new films opening and leading the box office this weekend, the list of films was finally re-shuffled around with some of the long standing holdovers finally slipping in position to make way for the new entries. There were no big stories for the weekend, but the top four films each managed to earn more than $13M a piece.

The new Nicolas Cage disaster flick KNOWING opened the box office with a solid $24.8M. It's hard to know where this will be heading in the weeks to come, but word of mouth has not been kind and it may struggle to build on this decent start.

The comedy I Love You, Man opened in second spot with a solid $18M. This film was well received and may do well in the coming days and weeks.

The new star vehicle DUPLICITY, starring Julia Roberts and Clive Owen opened unspectacularly with $14M. Given the calibre of stars and the more cerebral nature of the production (ie appeal to adults), this film has certainly under-performed and is likely a consequence of Roberts' lack of profile in recent years and Owen's love/hate relationship with the audience.

RACE TO WITCH MOUNTAIN held on relatively well in the face of the new competition, earning a decent $13M and only losing 46% of its audience in its second weekend. Disney has done it again, even if it had to mine old material to do it.

WATCHMEN holds on to fifth spot this weekend with a relatively small $6.7M take. Warner Brothers has now officially stated they will be moving away from R-rated superhero and tentpole films in the future, with the feeling that the R rating for WATCHMEN severely impacted its gross.

The US Box Office took in an estimated total of $97.4 million for the whole of the weekend 20-22 March 2009.