Director Christopher Nolan had long harboured an ambition to work with the 36-year-old star and was delighted when he agreed to appear in his movie `Inception`, and was even happier when he realised how dedicated the actor is.
Christopher said: "Leo is someone I had been trying to work with for years. I`d met him many times and nothing had come together, but I finally managed to convince him with this one and he brought an incredible amount of emotional focus to his character.
"He is extremely demanding, which actually helped me work out where in `Inception` the emotional importance of the story is."
Leonardo gets inundated with movie offers but admits he has high standards when it comes to agreeing to projects.
He explained: "I want it to be special and really original. For me, the three elements there have to be are; it has to be a great script, with a great director and great people to work with. That`s what I want and I guess it would sum up the dream for any actor."