Talladega Nights: The Ballad of Ricky Bobby kept its place at the top of the US box office chart over the weekend, earning a further $23.0m.

Opening in second place was Disney's dancing movie Step Up, followed by Oliver Stone's 9/11 film World Trade Centre in third.

Also opening were horror movie Pulse and Tim Allen's Zoom.

The top ten in full:
1. (1) Talladega Nights: The Ballad of Ricky Bobby - $23.0m
2. (-) Step Up - $21.0m
3. (-) World Trade Centre - $19.0m
4. (2) Barnyard - $10.1
5. (-) Pulse - $8.5m
6. (3) Pirates of the Caribbean: Dead Man's Chest - $7.2m
7. (5) The Descent - $4.6m
8. (-) Zoom - $4.6m
9. (4) Miami Vice - $4.5m
10. (7) Monster House - $3.3m