The Wolf Who Came to Dinner

Beatrice Barkley is an eight-year-old horror fanatic with a serious problem: her mom's brought her new boyfriend home to meet the family, and no-one but Bea seems to notice he's a werewolf. Over the course of the evening, Bea uses her expert knowledge of werewolf weaknesses in an attempt to expose the seemingly innocuous French teacher as a dangerous monster - with unexpected results. - IMDb