No Strings Attached is a 2011 American romantic comedy film starring Academy Award winner Natalie Portman and Ashton Kutcher. The film is directed by Ivan Reitman. Emma (Portman) and Adam (Kutcher) are friends who have sex one morning and worry about their friendship being ruined. They make a pact to have "no strings attached", to have casual sex without falling in love with each other. The film was released in the United States and Canada on January 21, 2011.