How Do You Know
- Release Date: December 17, 2010
- Genre: Comedy, Drama, Romance
- Director: James L. Brooks
- Producer(s): Laurence Mark, Paula Weinstein, Julie Ansell, James L. Brooks
- Writer(s): James L. Brooks
- Studio: Columbia Pictures
- Length: 2h 00m | Classification: G
- Official Site: howdoyouknow-movie.com
