The last thing any guy would want when he’s up close and personal with Angelina Jolie would be a bad case of gas.

But James McAvoy says that he suffered exactly that embarrassing little problem during the filming of their new movie, Wanted!

The skinny Scots actor had to bulk up in a hurry for his starring role opposite Angelina in the superhero flick, released June 27.

So producers told him to fill up with protein shakes and hit the gym four nights a week.

But the Narnia star told the Times of London newspaper during filming that he had to ditch the drinks because they were giving him "violent flatulence" on set.

“I’ve given up taking them and I’m just trying to eat as much steak and chicken as I can," he said.

Just as well with all those karate kicks!

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