OK, I know it's Monday, but see if you can keep up with this: in Looper, Joseph Gordon-Levitt stars as a mob killer who takes out people sent from the future. However, his job gets foiled when one of his hits (Bruce Willis) turns out to be his older self. His future persona is trying to track down and murder a young boy who is detrimental to his own survival.
Still with me? Now, add Emily Blunt to this messy web. The actress has signed on for the sci-fi action flick, as said boy's protective mother. That's all we know about her character at this point, but the role sounds rife for running scared — something the actress already has experience with.