Scott Foley Explains How to Lose More Than 10 Pounds Overnight

— -- Scott Foley is no stranger to shirtless scenes.

However, the "Scandal" star, whose show premieres tonight, said that the real work involved with them happens in the days leading up to the shoot.

"I'm a juice guy," Foley told ABC News. "If I have a big scene, I'll have three or four days only having vegetable juice or something."

Foley, 42, said that in one case, he had to shoot a shirtless scene after Thanksgiving, which meant that for his holiday celebration, he could only partake in the turkey. However, in a crunch, he also knows how to lose 20 lbs. in one day using the same technique fighters use to drop pounds.

"Drink a ton of water -- as much as you can -- don't eat anything, get in a sauna, sweat it out," he explained. "When you get home, get in a bath, as hot as you can take it. You fill it with Epsom salt and really hot water -- like 20 lbs. of Epsom salt so it's so salty that the salt doesn't even dissolve. That's going to suck all this water out of your body. You could drop 12-15 pounds by tomorrow morning."

However, the actor, who works with a nutritionist, said that that's not part of his regular routine, and doesn't necessarily recommend others try it.

Meanwhile, he laughed when asked about the diet of his co-star, Kerry Washington.

"Kerry eats some weird stuff! She came the other day with this Tupperware thing of, they look like potato chips but it was dried or flaked sauerkraut and it tasted like a foot. It was awful," he said with a laugh. "I think she does it on purpose!"

Kissing scenes means, of course, that they both freshen up, he added.

"She's very kind," he said. "We both brush!"