Orphan (2009)

Young married couple Kate and John are devastated at the tragic loss of their unborn child, a loss that has taken a toll on both their marriage and Kate's fragile psyche. When the couple decides to adopt another child they find themselves drawn to Esther, a young girl at the local orphanage. Almost as soon as they welcome the little girl into their home an alarming series of events begins to unfold, leading Kate to believe that there's something wrong with Esther - this seemingly angelic little girl is not what she appears to be.