Sony's The Green Hornet dropped from last week's top spot to come in at number two with an estimated $18.1 million. The drop reflects a solid 46 percent fall-off from last weekend.
Rounding out the top five were Ron Howard's The Dilemma which added an estimated $9.7 million to its $33.4 million total haul, Oscar-hopeful The King's Speech which brought in about $9.1 million and True Grit which roped in another $8 million to bring its 5 week total to just over $138 million.
Slots six through ten were occupied by Black Swan, The Fighter, Little Fockers, Yogi Bear, and Tron:Legacy.
Following is the full weekend box office run-down:
1. No Strings Attached - $20.3 million
2. The Green Hornet - $18.1 million
3. The Dilemma - $9.7 million
4. The King's Speech - $9.1 million
5. True Grit - $8 million
6. Black Swan - $6.2 million
7. The Fighter - $4.5 million
8. Little Fockers - $4.3 million
9. Yogi Bear - $4 million
10. Tron Legacy - $3.7 million