London: Actor Colin Firth insisted that essaying the role of stammering monarch in `The King`s Speech` was a ‘physical battle’ that he suffered.
The 50-year-old actor found portraying the role of King George VI so daunting, putting him in a state of "semi-paralysis", a website reported.
"Some part of you goes there. I try to play it as the character would be experiencing it, which is to try not to do it. The sheer physical effort that requires had an effect on my whole body, and while shooting `The King`s Speech` I suffered from headaches," Firth said on playing an emotional fragile character.
"Playing the role would put my left arm to sleep. I must have been tensing, particularly if I had long speeches. I must have been locking someone, pinching a nerve, because I couldn`t use it properly. It was a semi-paralysis that would last for three or four days. So I found myself in a physical
battle," said the actor.
After spending a long time essaying a stammering character, Firth found the vocal tic surfacing when he spoke after the filming.
"Even now I find myself stammering. Every time I talk about it, I am in danger of losing my flow," he added.