Jonathan Glazer's Under the Skin, which released this Friday in the US, has Scarlett Johansson in first fully nude role. The actor plays an alien seductress Laura who hunts single, wandering men on the streets of Glasgow, reported Huffington Post.Since Under the Skin was shot mostly guerilla-style with people unknowingly participating in the film, Johansson had to improvise her conversations with random people while trying to not give away her real identity as a highly recognisable Hollywood star.In the film, Laura lures men into her shadowy lair with her perceived innocence, then traps them with one powerful weapon: her naked body.At a press conference for the film in New York in March, Johansson said, "I'm not a provocative person." She said she discussed with Glazer how the nudity must serve the story and wasn't gratuitous. "You assume its going to be a screenshot for someone. You kind of have to weigh the value of the risk that you're taking."She was also conscious of her body image and "how self-conscious you can be about the way you look and your own vanity." She also had no idea how the scenes would be used in the film, since Glazer shot so much footage. "The first time I saw it I was terrified, partly because of things like the nudity," Johansson said. "I didn't know how that was going to be used. I didn't know how naked my performance would be figuratively."