Matthew McConaughey, Gold
The 47-year-old Oscar winner transformed his appearance to play gold prospector Kenny Wells, adding 47 lbs. to his typically athletic frame.McConaughey famously lost 38 lbs. for ‘Dallas Buyers Club,’ but ‘Gold’ marked the first time he'd ever gained weight for a role without adding muscle mass. "I haven't ever done that. I said, 'McConaughey, you have six months to say yes to whatever you want to eat and whatever you want to drink. Whenever.' That was fun," he says. "The only thing that gets tiring is the thought of quitting. It was fortunate that I was like, 'Oh, this is also my job, so let's go—all green lights.'"