Dennis Van Tine/Future Image / WENN
2. Christian Bale
Christian Bale went the other way and lost an amazing 62 pounds of body weight for his role in the 2004 movie The Machinist. This took four months of nothing less than starvation and a diet of 275 calories per day; one cup of coffee and an apple or a tin of tuna… it really isn’t healthy. Poor Christian had to put it all back on and more for his next role as Batman in Batman Begins. Whoever said acting was easy?