Charlize also gained around 30 pounds for her movie Monster. But recently shared that she’s done with gaining weight for movies because of how difficult it’s become to lose the weight again. “I will never, ever do a movie again and say, ‘Yeah, I’ll gain 40 pounds.’ I will never do it again because you can’t take it off,” she said. “When I was 27, I did Monster. I lost 30 pounds, like, overnight. I missed three meals, and I was back to my normal weight. Then I did it at 43 for Tully, and I remember a year into trying to lose the weight, I called my doctor, and I said, ‘I think I’m dying because I cannot lose this weight.’ And he was like, ‘You’re over 40. Calm down. Your metabolism is not what it was.’ Nobody wants to hear that.”

Source: https://www.buzzfeed.com/laurengarafano/actors-who-lost-or-gained-weight-for-roles