The Boy

Greta Evans, a young woman from Montana, is hired as a nanny by an elderly couple. For all she knows, it's a normal job, and as she needs to get away from Monatana and her abusive ex, but as she arrives, she's surprised. The couple introduces her to Brahms, who turns out to be a boy, the size of a four year old boy. The couple insists that's their son, and after hearing the tragic story about their child dying in a fire, and agrees to take care of him anyway. However, as the parents leave, the doll starts behaving strangely. It moves by itself, and Greta starts hearing the voice of the doll, calling for her. However, Greta will realize that something much strange than a sentiet doll is at work in the old house.
This movie is absolutely one of the stranger ones I've seen. The film itself is scary, the doll is creepy, and everything works. But the ending (which I will not spoil here, don't worry) is such a strange twist and it makes close to zero sense to me. I would recommend you watch this movie, if only because of the twisted ending that follows it.