Woody Harrelson didn't think he could play a policeman because he is "anti-authoritarian".
The actor portrays cop Dave Brown in the Oren Moverman-directed movie 'Rampart', and he surprised himself as he doesn't have much "in Common" with his character.
He said: "I didn't think I could believe myself as a police officer, partly because I am a little anti-authoritarian and also because a big part of being an actor is what you connect from your own life to the character.
"I never felt I had much in common with cops, nor did I think my imagination was wide enough to see myself as one."
He told Film3Sixty magazine: "This is a guy who finds himself in a hellish quagmire and his descent ends in deep paranoia. I was psyched to play him in the end."