Hide and Seek (2005)

David Callaway is a psychologist trying to help his 9-year-old daughter, Emily, recover from the trauma of her mother's suicide. They both move to a house in the woods, but far from contributing to her improvement, the environment has the opposite effect on Emily, whose behavior becomes odd and leads to the creation of an imaginary friend named Charlie. A gripping psychological thriller particularly disturbing thanks to the performances of its incredible cast and also to its well implemented doses of terror and scares.