Clooney`s `The American` role his darkest ever

London: Director Anton Corbijn admits that George Clooney`s role in "The American" is the darkest ever played by the actor.

"George was into the role, which surprised me. Maybe it`s because he`s never played such a dark character. Perhaps in `Michael Clayton` or `Syriana` he was unsympathetic, but he`s never been this harsh or unappealing," quoted Corbijn as saying.

"It was fabulous for me that he was able to go that dark. He does so much with so little. He was ideal," Corbijn added.

Clooney played the role of an assassin in the film.