The 49-year-old actor released the Rajkumar Hirani-directed film's first trailer on the occasion of Diwali.
    
"I have been working for the last 25 years and 'PK' is by far my toughest role in my career. I have not blinked in the movie. We had discussed a lot about shaping up my character but we felt everytime that something is missing," Aamir, who would be seen in a quirky avatar, said.
    
In the film, Aamir's character is an admirer of betels. "PK is fond of paan. I am too. During the shooting of the film I must have consumed near about 100 paans. There used to be a paanwala on the set for us," Aamir said.
    
'PK' would be the second collaboration between Aamir and the National-award winning director after super hit film '3 Idiots'. Hirani took five years to complete the film.

"When I was finishing '3 Idiots' I realized that I should start my next film and at that point of time I and Abhijat (Joshi) went for a walk at Borivli National Park. And there we thought of PK and then Abhijat went to USA. And we used to discuss the topic and thus the film happened. It took five years to finish because the script took a long time as we tried to convey a strong message in an entertaining way," Hirani said.
    
Anushka Sharma plays the female lead in the film and she would be seen in a completely new look.
    
"I am very excited to play the role in PK. When we were doing costume trial we went for different looks with the wigs and glasses. And finally when the look worked out I am getting a lot of compliment specially all the girl wants to have a hairstyle like me," said Anushka, who was also present at the event.

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