10 Horror Movie Transformations Nobody Saw Coming

10. Louise - Spring

Fellas, don't you just hate it when you meet a girl on holiday and she turns out to be a 2000-year old monster only interested in your sperm so she can have a baby and then devour its essence from inside her womb to replenish her ever-lasting youth?

Well this is exactly the situation Evan finds himself in when he meets Louise in Italy. Of course, she doesn't immediately tell him about her unique predicament (it's something you might bring up on a third or fourth date, but certainly not the first), but things get complicated when it turns out that she actually really does like him, and doesn't just want to use him as a means to an end.

Still, she's started the process, which also leaves her body in a state of flux, transforming between different mutations on a regular basis. Most of these are unseen, but one time the audience is given a quick glimpse of this painful process, where Louise is seen writhing in agony, half human and half fish monster.