Leonardo DiCaprio has revealed he suffers from Obsessive Compulsive Disorder. The 'Titanic' star says he has to force himself not to step on every chewing gum stain when walking along and fight urges to walk through a doorway several times, because he doesn't want his condition taking over his life. He said: "I'm able to say at some point, 'OK, you're being ridiculous, stop stepping on every gum stain you see. You don't need to do that. You don't need to walk 20ft back and put your foot on that thing. Nothing bad is going to happen.'" However, the Hollywood heartthrob says he let his firm grip on his condition go when making his latest movie, 'The Aviator', as his character, Howard Hughes, also suffered from the disorder, helping him make his portrayal more realistic. He said in an interview with Britain's Daily Mirror newspaper: "I let it all go and never listened to the other voice. "I remember my make-up artist and assistant walking me to the set and going, 'Oh God, we're going to need 10 minutes to get him there because he has to walk back and step on that thing, touch the door and walk in and out again.'

"I let myself do it because I wanted that to come out. I was trying to be that character but it became really bothersome - and it continued way after the filming.

I can talk myself through it, whereas Howard Hughes couldn't do that and people with hard-core OCD can't."

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