Hollywood hunk Gerard Butler is undergoing a brutal detox regime in a bid to lose weight and get healthy. The 300 star is surviving on a diet of just lemon water and cayenne pepper, designed to cleanse his body of toxins - a method he turns to whenever he needs to trim down and get in shape for a film role.

However, he's finding it extra tough this time - because he's undergoing the grueling detox for his own peace of mind and has to rely on himself for motivation.

Butler explains "I'm on a cleanse right now. I have the lemon water! It's a nightmare because normally there's time constraints and I have my trainer and nutritionist to enforce the law."

"I'll literally have people there hiding cupcakes from me. Once my trainer caught me, he said, 'You're in that trailer over there, right? I heard you're eating chocolate cake', and I'm like, 'Me? No!' My heart is literally pumping so fast trying to sneak this cake when my trainer's not looking!"

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(This news article provided by World Entertainment News Network)