Jamie Bell finds it ''excruciating'' watching himself on screen.

The 'Billy Elliot' star has admitted he hates having to watch his performance in a movie back but insists it is ''useful'' as it helps him improve his acting ability.

He said: ''I don't really enjoy watching any of my work at all. To get me to sit down in a screening, you almost have to nail me to the f***ing floor.

''It's useful, because you get to see what mistakes you think you made and what choices didn't quite work out the way you wanted them to.

''But at the same time, it's such an excruciating experience because it's final. You can't do anything about it. So the process of re-watching it becomes so pointless.''

And the 29-year-old star also revealed he thought a director's body of work was far more ''interesting'' than that of an actor's.

Speaking to Robert Pattinson for Interview magazine, he added: ''I think I have much more appreciation for directing and movies overall versus a performance or an actor. Their body of work is more interesting.

''It's hard to define somebody by one movie. I mean, unfortunately, my entire life was basically made by 'Billy Elliot'. It was kind of created by that one catalytic moment.''