My Babysitter's a Vampire(2010)
OVERVIEW
Geeky 14-year old Ethan is left to babysit his younger sister, Jane, with his best friend Benny but after Ethan inadvertently puts Jane in harm's way, his parents hire a professional babysitter, the beautiful yet mysterious 17-year-old Sarah who, unbeknownst to them, is actually a fledgling vampire.
TAGLINE:
No parents. No rules. No pulse.