Hide and Seek (2005)

Synopsis
A newly single father discovers his daughter is caught up in a web of evil in this thriller. David Callaway (Robert De Niro) has been left to raise his nine-year-old daughter, Emily (Dakota Fanning), on his own after the unexpected death of his wife. David is at first amused to discover that Emily has created an imaginary friend named "Charlie," but it isn't long before "Charlie" develops a sinister and violent side, and as David struggles with his daughter's growing emotional problems, he comes to the frightening realization that "Charlie" isn't just a figment of Emily's imagination. Hide and Seek also stars Famke Janssen, Dylan Baker, and Amy Irving. ~ Mark Deming, All Movie Guide