I remember a part of the trailer. There is a young girl hiding under her bed, and there's a demon(ghost maybe?) who is pretending to be the girl sat on the bed.
The demon on the bed says to the babysitter or maybe her sister, I think there is a monster under my bed. She looks under the bed and the little girl goes, that's not me.
When the woman looks back up, it's an old woman sat on the bed.
Can anybody remember what movie this is? I've never actually watched it and want too.