Cirque Du Freak: The Vampire's Assistant(2009)

A boy unknowingly breaks a 200-year-old truce between two warring factions of vampires. Pulled into a fantastic life of misunderstood sideshow freaks and grotesque creatures of the night, one teen will vanish from the safety of a boring existence and fulfill his destiny in a place drawn from nightmares. 14-year-old Darren was like most kids in his suburban neighborhood. He hung out with his best friend, got decent grades and usually stayed out of trouble. But when he and his buddy stumble upon a traveling freak show, things begin to change inside Darren. That's the exact moment when a vampire named Larten Crepsley turns him into something, well, bloodthirsty.