The third installment of the Bourne trilogy went straight to the top of the US box office chart this weekend.

The Bourne Ultimatum beat the takings for the first two movies but also smashed the record for August, grossing $70.2 million.

The Matt Damon flick is the final part of the series following Jason Bourne and his personal mission to find out about his unknown past.

The Simpsons Movie dropped into second place, but new film Bratz only managed to enter in at number ten.

The US box office top ten in full:

1. (-) The Bourne Ultimatum - $70.2m
2. (1) The Simpsons Movie - $25.6m
3. (-) Underdog - $12.1m
4. (2) I Now Pronounce You Chuck and Larry - $10.5m
5. (4) Hairspray - $9.3m
6. (3) Harry Potter and the Order of the Phoenix - $9.3m
7. (5) No Reservations - $6.6m
8. (6) Transformers - $5.6m
9. (-) Hot Rod - $5m
10. (-) Bratz - $4.3m