Paramount have unveiled the official trailer for the forthcoming romantic comedy No Strings Attached.

No Strings Attached is directed by Ivan Reitman (Ghostbusters) and stars Natalie Portman, Ashton Kutcher, Cary Elwes, Lake Bell, Kevin Kline, Olivia Thirlby and Greta Gerwig.

Synopsis: A guy (Kutcher) and girl (Portman) try to keep their relationship strictly physical, but it’s not long before they learn that they want something more.

Check out the trailer below, courtesy of Moviefone:

No Strings Attached will be released on January 21, 2011.