21 actors who took their roles so seriously it got out of hand Christian Bale

Christian Bale has since vowed not to mess with his weight again following his Oscar win for Vice earlier this year but, back in 2004, he lost such an alarming amount of weight for the role of Trevor Reznik in The Machinist that he became virtually unrecognisable. "I was intrigued by a perverse nature of mine just to see if I can go beyond what I've been told is actually safe and okay, and see if I could push the limits," he went on to tell the BBC.