Throwing light on his role, the actor said: 'I am playing the role of Charlie and Guddu - two brothers - in the movie. They are entirely different characters and do not even match with my real life, therefore it was a challenging task for me to play the role to perfection.'

One of the characters he plays stammers and to prepare for the role Shahid met many ENT doctors, speech therapists and people with stammering problems.

'As the protagonist in the movie has some speech disorder, I met many experts as we did not want to make a caricature out of the characters. We have portrayed them very seriously and sensibly,' he said.

About the title, he said: 'When Vishal told me the title then I actually stood up in surprise. Even Priyanka and other star-cast were equally surprised. But when Vishal explained to us the plot, we realised that it is the most appropriate title as he wanted to communicate something that was really different.'

Shahid, who has six-pack abs in the film, says he is more concerned about building physical strength.

'I'm purely vegetarian and crazy about my fitness. My main aim is to increase my physical strength and not the body size. I do an amalgamation of cardio-vascular exercises, free hand and weight training for four-five days in a week,' he said.