LONDON: British actor James McAvoy has confessed he caused a stink on the sets of Wanted by constantly farting.

Thesun.co.uk says McAvoy had to bulk up for the movie. So he had to drink a lot of muscle-gain supplements. “They made me down these shakes which I had to make from huge tubs of the stuff. To be fair, it really helped, but it came with a massive side effect of me violently farting. It was so often and so vigorous, I couldn’t stop. When I was filming I was by far the biggest farter in Hollywood. I had to give up the shakes after a month and start eating chicken and steak instead as it was getting embarrassing.”

He stopped taking muscle-gain supplements after he was done with the role. “I found caffeine, alcohol and smoking break down muscle and there was no way I was giving them up.”