Underworld

And a very quick movie review I've been meaning to put up:

Underworld: Kate Beckinsale, as a vampire (Selene), wearing lots of leather.

There's a plot involving Werewolves, sleeping vampire elders, and a centuries-old betrayal, but really, it's all about Selene kicking much ass (wearing leather).  If that appeals to you, watch the movie; if not, then don't.