The 34-year-old actress is reteaming with Emraan Hashmi for the comedy thriller, being directed by Rajkumar Gupta of 'No One Killed Jessica' fame.
"I am nervous about the film because it is my first comedy. I am worried whether I will be able to strike the funny chord with my audience. Shooting is currently on and I am really working hard for it," Balan said.
The national-award-winning actress, who was in the capital to attend the ongoing CII Media and Entertainment Summit 2012, said that her films have tried to blur the concept of elite audience.
Both her films 'The Dirty Picture', which saw her portraying the role of a dancing star and 'Kahaani', about a pregnant woman's search for her missing husband, did well at the box office.
Balan said the success of these two completely different films indicated that they were being watched by middle class.
"My films have not completely broken the concept of elite audience but they have tried to blur it. Middle class is a fluid class as they aspire to become the elite. But we cannot say that they didn't watch it because 'Kahaani' earned 60 crores and it denotes that other sections of the society also related to it," said Balan while was speaking on the topic of 'Media as a Catalyst for Social Change'.
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The actress, who has kept herself away from the regular dance and song films, said films mirror the reality of the society.
"Today people are more receptive to seeing and thereby participating in the change that is taking place in the society through cinema. There is an after effect of a film and that influences people in the society. Cinema is influenced by what's happening around us."
Balan said she decided to become a part of 'The Dirty Picture' because she felt Silk Smitha represented the average Indian woman.
"I was not sure about it five years ago but I chose to do the film now because Silk Smitha is a woman who lives her life to the fullest and at the same time she knows how to fight for her rights. It was that resonance which made me choose the role."