United Kingdom, Jan. 27 -- Bill Murray has "done some damage" in his life.

The 74-year-old actor has revealed that he prefers to play complicated on-screen characters, because he can often relate to their failings.

The Hollywood icon said at the Sundance Film Festival: "It's always interesting when you're playing a guy who has done some damage. I know I've done some damage."

Bill observed that the real-life damage he's caused has been "unconscious" - but he didn't discuss any specific examples.

He said: "It's unconscious damage, but it's some sort of penance to play them and to show that, you know, to show accepting responsibility for it."

The 'Groundhog Day' star has enjoyed huge success in his career. However, Bill has also confess...