Superstar George Clooney's girlfriend Stacy Keibler has revealed that she lost weight by following a strict diet.

The 33-year-old model, who is dating superstar George Clooney, said she lost weight unintentionally without any work out, reported a website.

"I actually took some time off from working out just to see how my body reacted to certain foods by eliminating them out of my diet. I did no gluten, no soy, no dairy, I did no sugar. I was eating protein and vegetables.

"I felt amazing. I really do believe you are what you eat. When I was on it, I actually lost weight and that was without working out. So that was part of the experiment I wanted to do, was to see how my body my reacted," she said.