'G.I. Joe' soars to top of US box office

G.I. Joe: The Rise Of Cobra has debuted at the top of the US box office, pulling in $56.2 million over the weekend.

Nora Ephron's Julie & Julia, starring Meryl Streep and Amy Adams, has debuted in a distant but respectable second place with $20.1 million.

The animated feature G-Force remains steady at number three with $9.8 million and Harry Potter And The Half-Blood Prince takes the number four slot with $8.8 million.

Channing Tatum's action flick has knocked last week's champ Judd Apatow's Funny People to the number four spot with $7.8 million in its second week in release.

This week's third debut comes from the thriller A Perfect Getaway at number seven with $5.7 million.

Finally, (500) Days of Summer, starring Joseph Gordon-Levitt and Zooey Deschanel, returns by jumping two spots to the number ten position with $3.7 million, pulling in a 34% increase from last week's number twelve ranking.

The US box office top ten in full:

1. (-) G.I. Joe: The Rise Of Cobra - $56,200,000
2. (-) Julie & Julia - $20,100,000
3. (1) G-Force - $9,804,000
4. (2) Harry Potter And The Half-Blood Prince - $8,880,000
5. (1) Funny People - $7,866,000
6. (4) The Ugly Truth - $7,000,000
7. (-) A Perfect Getaway - $5,765,000
8. (5) Aliens In The Attic - $4,000,000
9. (6) Orphan - $3,730,000
10. (12) (500) Days of Summer - $3,725,000