"Firstly, I loved the story of the film. Secondly, Mohit Suri, the director of the film, I think he is most suited for such genre," Sidharth said here in an interview.
"Had this script involved a new director, I would not have gone for the film. I think Mohit was the right choice for the film. I was so excited because there was so much new to be done and explored," he added.
The 29-year-old's dark and intense character in the film is an antithesis to his romantic and lover boy image in his previous two films - "Student of the Year" and "Hasee Toh Phasee".
Sidharth is confident that the audience will be surprised to see him in such a character.
"I think when people do not expect you to do something unusual and that time only you come out with something like that, a surprise factor is likely to come up and this is what I like the most," the actor said.
Why did you choose to play such a grey character so early in your career?
"There is no time bounding that I should play such character today or tomorrow. Whether I do this film or the films of other genre, there is no guarantee whether that film will work or not.
"I think every film involves a risk," he added.
It will hit the theatres June 27.