Movie where an Alabama boy is dating a witch

When Petula and Dorothy cover up the accidental murder of one jerk boyfriend, they hatch a hilarious scheme to collect a huge ransom.

Ethan Wate just wants to get to know Lena Duchannes better, but unbeknownst to him, Lena has strange powers. As Lena's 16th birthday approaches she might decide her fate, to be good or evil. A choice which will impact her relationship forever.