Longoria, 38, who would be seen next in "Out of The Blue", credited dieting behind her hourglass figure, reported OK! magazine.
"Diet and exercise (are the key to my figure). It's no secret, really. It's just dieting. I don't really eat a lot of sugar. My diet usually consists of no sugar, no carbs, and then I work out with a trainer," she said.
Asked whether it has been difficult for her to curb sugar from her diet, she said, "I was on a no-sugar thing for a couple months, and then I'll go off it, and then I go back. It gives you more energy and helps you sleep better. It's the most slimming-it's the diet that gives me the most results.