The serial killer in question is Chucky from the Child's Play series of movies. Hannah is confirmed as playing the "PA of Jennifer Tilly" in the forthcoming movie Child's Play 5, and filming started in Romania this week. This is not the first time Hannah has been on the big screen - you can currently see her in Agent Cody Banks 2 (that movie with the guy from TV's Malcolm In The Middle)
Okay, so we kinda lead you down the garden path, but it made you look, didn't it!? Who says S Club news articles can't pull readers?