January 12, 2011 06:57:29 GMT
The movie beauty hit the red carpet solo, while the lead actor was supported by his wife Demi Moore and step daughter Rumer Willis.
Being pregnant does not stop Natalie Portman from promoting her film. The 29-year-old actress showed up in a peep-hole Vena Cava gown at the Regency Village Theater in Westwood, California on January 11 to attend the Los Angeles premiere of "No Strings Attached" in which she stars opposite Ashton Kutcher.
Unlike Portman who was pictured without fiance Benjamin Millepied on her side, her co-star Kutcher was accompanied by wife Demi Moore and backed up by her daughter Rumer Willis at the special screening. The on-screen couple, however, took a moment to pose together for photographers.
Other cast members like Greta Gerwig, Lake Bell, Mindy Kaling, Cary Elwes and Kevin Kline also took part at the promotional event, joined by director Ivan Reitman. Kat Dennings, who will be seen in "Thor" released by Paramount Pictures on May 6, came to the premiere as a guest.
Paramount will drop "No Strings Attached" in theaters across the nation on January 21. Two new clips from the movie have just made their way out on the web, with one of them featuring naked and hungover Ashton Kutcher who is teased by Natalie Portman's female friends, and the other exposing him in a steamy scene with another lady.
The story revolves around two friends, portrayed by Portman and Kutcher, who start a relationship where they have sex without involving any emotional baggage. But it's not long before they learn that they want something more.