The ketogenic diet is all the rage right now. The idea is to eat plenty of fat and very few carbs, so that your body enters a fat-burning mode known as ketosis.

While there’s nothing new about the high-fat, low-carb eating plan, it’s getting a lot more mainstream attention, including from movie and TV stars. Jersey Shore’s Vinny Guadagnino has gone full “keto guido,” Halle Berry has ditched bread to stay slim and look more stunning than ever, and even LeBron James dabbled. Keto enthusiasts tend to believe that they feel full with fewer calories when indulging in rich meats.

Here are the biggest celebrities who have committed to going keto.