'No Strings Attached' snares audiences, wins weekend box office

Concern over Oscar frontrunner Natalie Portman slumming it in a romantic comedy will likely diminish now that it has a weekend win under its belt.

Portman and Ashton Kutcher's "No Strings Attached" is on track to win the weekend, with an estimated $20.3 million in ticket sales.

Their closest competition, "The Green Hornet," fell 46 percent from its winning weekend, bringing in an additional $18.1. New award season darling "The King's Speech" was the only entry in the top 10 to not drop in sales from one week to the other.    

The full top 10:

"No Strings Attached," $20.3 M
"The Green Hornet," $18.1 M
"The Dilemma," $9.7 M
"The King's Speech," $9.2 M
"True Grit," $8 M
"Black Swan," $6.2 M
"The Fighter," $4.5 M
"Little Fockers," $4.4 M
"Yogi Bear," $4.1 M
"Tron Legacy," $3.7 M