Only the best actors dedicate themselves to overeating for a role. They pack on the pounds to better fit the director’s vision and fully embody the character. The hard part is shedding the weight after filming. I’m still waiting for the actor that progressively goes after heavier and heavier roles over the course of their career, ending as a disgustingly obese Oscar contender.
Rob McElhenney, It’s Always Sunny in Philadelphia (52 lbs.)
George Clooney, Syriana (30 lbs.) 
Russell Crowe, Body of Lies (63 lbs.) 
Jared Leto, Chapter 27 (67 lbs.) 
Vincent D’Onofrio, Full Metal Jacket (70 lbs.) 
Benicio Del Toro, Fear and Loathing in Las Vegas (40 lbs.) 
Robert De Niro, Raging Bull (60 lbs.) 
Source: bigpicture.ru
