http://zynga.com/play/cityville/?src=zdc&aff=homepage&crt=carousel -play the cityville game and build a house. When you move in your family an icon for House at the end of the street should appear. It looks like this. Click that, watch the trailer, and you’ll get a free fandango code to see the movie.
Don’t forget to check the Free Stuff Times Screenings page for more free movies in your area.