Beautiful Creatures

This based-on-tween-lit supernatural romance should in no way be confused with the Twilight series. It's about a mopey high school boy who falls in love with a girl harboring a dark supernatural secret. And she's a witch, not a vampire. OK, but what exactly are Emma Thompson and Jeremy Irons doing in this maudlin, faux-Gothic potboiler? 124 minutes PG-13.