'PK' one of my favourite films: Aamir Khan

"In the last 25 years, whatever I have done - be it '3 Idiots', 'Lagaan', or 'Sarfarosh' - they are on the one side and this character is on the other side. It's one of the most important and difficult roles," he said.

"There are so many moments in the film and some will make you smile, some will make you cry. 'PK' is one of my favourite films I have done till date."