AceShowbiz - Leonardo DiCaprio becomes reclusive while he is filming emotionally-charged roles, insisting he likes to "isolate" himself for "months at a time." The Hollywood actor stars in Martin Scorsese's new thriller "Shutter Island", and studied mental illness for his role as a detective trying to solve a missing persons mystery in an asylum.

DiCaprio admits he shut his loved ones out while he was working on his character - because he prefers to be alone to perfect his acting method. He says, "It is the nature of the character dealing with extreme emotional trauma."

He adds, "And it's hard for those types of things not to rub off on you but for the most part I do like to isolate myself away from most people when I'm filming for months at a time, and so I wouldn't necessarily get a reaction from anyone else because I was mostly alone."