The yet-to-be titled film, which will go on the floor in August, will be produced by Rawal, the actor's second production venture after "Oh My God!".
"I will start shooting the Narendra Modi biopic from August. It's a massive responsibility being an actor to portray a leader of such great stature. He knows that I am playing him in his biopic," Rawal told reporters here.
For the Modi biopic, the national-award winning actor says he will have to research a lot before starting the shoot, adding he will not mimic him.
In "Dharam Sankat Mein", Rawal is sharing screen space with veteran actor Naseeruddin Shah, whom he considers his inspiration.
"It's always a joyride to work with him. It's a learning process for me. He is not only a good actor but also a good human being. I want to have timeless, truth and depth-like Naseer bhai in my career. He has always been my inspiration," he said.