Priest

Priest is a movie starring Paul Bettany, Cam Gigandet, and Maggie Q. A priest disobeys church law to track down the vampires who kidnapped his niece.
In an alternate world, humanity and vampires have warred for centuries. After the last Vampire War, the veteran Warrior Priest lives in obscurity with other humans inside one of the Church's walled cities. When the Priest's niece is kidnapped by vampires, the Priest breaks his vows to hunt them down. He is accompanied by the niece's boyfriend, who is a wasteland sheriff, and a former Warrior Priestess.