Scarlett Johansson is a a “sexually voracious” alien? Scarlett Johansson will has joined rector Jonathan Glazer’s science fiction drama Under The Skin. Based on Michel Faber’s novel, the story centres on an extra-terrestrial hiding out on Earth in the form of a perfect woman, using her looks to catch human prey. Scarlett Johansson’s character has been described as a “sexually voracious” alien woman. Glazer, the director of Sexy Beast and Birth, penned the script adaptation with Walter Campbell. Production on Under The Skin is due to begin in Spring 2011.