Last weekend's top film, the Sony Pictures terrorism thriller "Vantage Point," dropped to second place with $13 million in ticket sales, bringing its two-week domestic total to $41 million.

Sony's new release "The Other Boleyn Girl" performed better than expected, opening at No. 4 with $8.3 million at 1,166 theaters. Its $7,118 per theater average outdistanced other movies in the marketplace.

The weekend's other opening, the Summit Entertainment fantasy romantic comedy "Penelope," debuted in eighth place with $4 million.

Box office revenues overall were down for the third straight week. The top 12 movies grossed $81 million, down 10 percent from last weekend and 25 percent from the same weekend in 2007.

Estimated ticket sales for Friday through Sunday at U.S. and Canadian theaters, according to Media By Numbers LLC.

1. "Semi-Pro," $15.3 million.

2. "Vantage Point," $13 million.

3. "Spiderwick Chronicles," $8.8 million.

4. "The Other Boleyn Girl," $8.3 million

5. "Jumper," $7.6 million.

6. "Step Up 2 The Streets," $5.7 million.

7. "Fool's Gold," $4.7 million.

8. "Penelope," $4 million.

9. "No Country For Old Men," $4 million.

10. "Juno," $3.4 million.