Kate Beckinsale is back to kill more vampires and werewolves, as Underworld: Blood Wars comes out in US theaters this weekend. The Underworld franchise focuses on the longstanding grudge between vampires and werewolves, a popular trope in many fictional books, movies, and comics.
There's no definitive reason as to why werewolves and vampires hate each other. Sometimes it's because vampires can control werewolves in their feral forms, while other times it's because werewolves are bred specifically to kill vampires.
Regardless of the reason, vampires and werewolves can't help but hate each other, so here are a few of our favorite vampire vs. werewolf rivalries over the years: