He's Just Not That Into You is a 2009 American romantic comedy-drama film directed by Ken Kwapis, based on Greg Behrendt and Liz Tuccillo's 2004 self-help book of the same name. It follows nine people and their varying romantic problems. Gigi, a common thread amongst the characters, is followed more closely than the other eight and has a more developed storyline as she consistently misreads all of her romantic partners' behaviors. She meets Alex, who helps her to interpret signs given to her by her dates.

The film stars an ensemble cast of Ben Affleck, Jennifer Aniston, Drew Barrymore, Jennifer Connelly, Kevin Connolly, Bradley Cooper, Ginnifer Goodwin, Scarlett Johansson, and Justin Long. The film was produced by New Line Cinema and Flower Films, the production company owned by Barrymore, who is also the film's executive producer.

Production began in Baltimore in 2007. The film was released on February 6, 2009 by Warner Bros. Pictures to mixed reviews. It grossed $27,785,487 on its opening weekend and over $178,866,158 worldwide.