5. Michael Fassbender (Hunger)
The 2008 British-Irish historical-drama film ‘Hunger’ starred 37 year old German-Irish actor Michael Fassbender in the role of Bobby Sands, a member of the Provisional Irish Republican Army who died on hunger strike while imprisoned at HM Prison Maze. To play the role, for ten weeks Fassbender lived on little more than nuts and berries, starving himself into skeletal shape. He shed 42lb, transforming himself from a well-fed 12 stones to an undernourished nine stones. By fasting under medical supervision, with an allowance of less than half the recommended daily intake of 2,000 calories, he reduced the risk to his health.