Karan admitted 'Taare Zamen Par' was one of the most 'emotive experiences' of his movie-going life.
Talking about his experience, Karan told IANS: 'I couldn't move from my seat for 10 minutes after the show. I just sobbed like a baby. I was so moved by the story of the parents discovering the core of their child's spirit that I now want to be a parent.
'I'm neither married nor have I ever intended to be a father in real life. But after watching 'Taare Zamen Par' I truly want to a father, to connect with a child on a level that only a parent can understand.'
An ardent friend and fan of Shah Rukh Khan, Karan is fulsome in his praise for the other Khan superstar.
'After seeing the film with a regular ticket-paying audience, I called up Aamir and told him that sincerity of vision was part of his DNA. He just can't help being the creator and the artiste that he is.
'It's hard to believe 'Taare Zamen Par' is his first film as a director. Look at the performance he has got out of the child actor Darsheel Safary.'
Sighs Karan: 'Taare Zameen Par' is a landmark film. It is definitely one of the best films I've seen in recent times.'