Cage's 'Knowing' scores US top spot

Nicolas Cage's Knowing has debuted at the top of the US box office.

The sci-fi film's $24 million haul is enough to hold off competition from other new releases I Love You, Man and Julia Roberts/Clive Owen thriller Duplicity, which land at number two and three respectively.

Last week's box office winner Race To Witch Mountain slips to number four, while superhero comic adaptation Watchmen falls to number five.

The US top ten in full:

1. (-) Knowing - $24,814,000
2. (-) I Love You, Man - $18,005,000
3. (-) Duplicity - $14,402,000
4. (1) Race To Witch Mountain - $13,004,000
5. (2) Watchmen - $6,725,000
6. (3) The Last House On The Left - $5,921,000
7. (4) Taken - $4,100,000
8. (6) Slumdog Millionaire - $2,700,000
9. (5) Madea Goes To Jail - $2,510,000
10. (9) Coraline - $2,143,000