The 37-year-old actor says he did not consciously decide to have an image makeover but is nervous about the reaction of the audience to his experiment in the Akshay Kumar-starrer.
"I am playing a policeman in the film. I did not do it on purpose. I didn't have a plan that I have to change my image and do a different role. It just happened. I am not worried, I am rather nervous. I have been playing a girl on national TV for a long time. So, first being accepted in a man's role is a worry for me," Grover told PTI.
The action film, which also stars Shruti Haasan and Jaideep Ahlawat, has been directed by Telugu director Krish.
Grover, who was approached by co-producer Shabina Khan for the film, said he agreed to do the film as his character is well-sketched and has a major part in the story.
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"It is an important character in the narrative. I have done guest appearances and small roles before. But in this film my role is a full-fledged character and has a role to play in the story. It is a substantial part," said the actor, who has earlier done small roles in films like "Zila Ghaziabad", "Heropanti" and "Ghajini".
Grover, who has mostly been part of comedy-based shows, said he feels good with the fact that despite his prolonged participation in light-hearted show, filmmakers are considering him for non-comic roles.
"I am fortunate to be acknowledged by the people. I am happy and content with the way people have showered love on me. I don't mind comic roles, I am glad that I am able to put smile on people's faces.
"But in the recent times, if I have been offered ten films, then eight of them were not funny characters. So, I am happy filmmakers are considering me for various roles, not just comedy," Grover said.