'No Strings Attached'

Actress Tia Carrere arrives for the Los Angeles premiere of 'No Strings Attached' at the Regency Village Theatre in Los Angeles, California. (AFP/David McNew)

Natalie Portman and Ashton Kutcher pose at the premiere of 'No Strings Attached' at the Regency Village theatre in Los Angeles. (REUTERS/Mario Anzuoni)

Natalie Portman poses at the premiere of 'No Strings Attached' at the Regency Village theatre in Los Angeles. (REUTERS/Mario Anzuoni)

Ashton Kutcher, Kevin Kline and director Ivan Reitman speak to each other at the premiere 'No Strings Attached' in Los Angeles. (AP/Matt Sayles)

Natalie Portman greets co-star Kevin Kline (L), as co-star Ashton Kutcher watches, at the premiere of 'No Strings Attached' at the Regency Village theatre in Los Angeles. (REUTERS/Mario Anzuoni)

Natalie Portman is interviewed at the premiere of 'No Strings Attached' at the Regency Village theatre in Los Angeles. (REUTERS/Mario Anzuoni)

Jake Johnson arrives for the Los Angeles premiere of 'No Strings Attached' at the Regency Village Theatre in Los Angeles, California. (AFP/David McNew)

Ashton Kutcher and his wife actress Demi Moore attend the premiere of 'No Strings Attached' at the Regency Village theatre in Los Angeles. (REUTERS/Mario Anzuoni)

Actress Demi Moore waves at the premiere of 'No Strings Attached' at the Regency Village theatre in Los Angeles. (REUTERS/Mario Anzuoni)

Cast member Natalie Portman poses at the premiere of 'No Strings Attached' at the Regency Village theatre in Los Angeles. (REUTERS/Mario Anzuoni)

Cast member Cary Elwes poses at the premiere of 'No Strings Attached' at the Regency Village theatre in Los Angeles. (REUTERS/Mario Anzuoni)

Actress Lake Bell arrives for the Los Angeles premiere of 'No Strings Attached' at the Regency Village Theatre in Los Angeles, California. (AFP/David McNew)

Actress Mindy Kaling arrives for the Los Angeles premiere of 'No Strings Attached' at the Regency Village Theatre in Los Angeles, California. (AFP/David McNew)