The Machinist (2004)
Following his iconic performance as the shredded corporate killer from “American Psycho” in 2000, Bale embarked on his first major physical transformation for 2004’s “The Machinist.” He dropped a staggering 63 pounds, ignoring the advice of a nutritionist, weighing in at just 121 pounds. “When I had got down to what she had told me was a healthy weight, I just went, ‘You know what? I can go more than this. I can keep going,’” he told the BBC in a 2008 interview. “So I lost another 20 pounds below what she said I should stop at.”
To reach his goal, Bale ate just an apple and a can of tuna a day, according to GQ. Maggie Moon, M.S., RDN, and author of “The MIND Diet,” says that such a diet would meet less than a fifth of his body’s needs. Safely losing weight for an adult male requires at least 1,500 to 1,800 calories a day, and can of tuna and a large apple won’t break 300 calories. "The body uses calories to maintain basic metabolism, nerve function, circulation and body heat," she says. "At such a low calorie count, those functions and nutrient needs across the board will suffer.” Even Bale admitted to GQ that he went too far.
Read more: 7 Celebrity Diet Secrets