The Blood Diamond actor stars in the Martin Scorsese directed film, Shutter Island, playing a tormented police officer who is stuck in a hospital for the criminally insane.

The actor who has shyed away from typical Hollywood heart throb roles, was put through tough scenes for the movie, some of which included delivering complicated dialogue whilst having rats thrown at him. Eww!

According to the Daily Star, the actor said that filming the movie took an emotional toll on him and he would often forget where he was.

"My character was going through extreme emotional trauma and it's hard for those types of things not to rub off on you. Mark Ruffalo and I had to spout out three pages of dialogue. We had to talk through the wind machines, the rain machines and rats being thrown at us. But, just like the character, we had to persevere in finding out what was really going on in Shutter Island.

"A few weeks towards the end of filming, I started to forget where I was. We kept pushing this character further and further. It was day after day of re-enacting a traumatic event that was either a dream or reality for this guy. I remember saying to Marty, 'I have no idea where I am or what I'm doing.'"

Shutter Island sounds pretty intense. Will you go and see Leo in his 4th Martin Scorsese directed film?