The Host

2013

Directed by Andrew Niccol

Cast: Saoirse Ronan, Diane Kruger, Max Irons, Jake Abel, William Hurt

A parasitic alien soul is injected into the body of Melanie Stryder. Instead of carrying out her race's mission of taking over the Earth, "Wanda" (as she comes to be called) forms a bond with her host and sets out to aid other free humans.