"2 States - the film, starts shooting its next schedule in IIM Ahmedabad tomorrow (Monday). Real location. Real excitement," Bhagat tweeted on Sunday.
Based on his 2009 novel 2 States: The Story of My Marriage, the film is not his first novel to be adapted into a movie.
Recently, he wrote the screenplay for Abhishek Kapoor's Kai Po Che!, an adaptation of his book The 3 Mistakes Of My Life.
Earlier, his bestsellers One Night@The Call Centre and Five Point Someone were made into movies Hello (2008) and 3 Idiots (2009), respectively.
The film 2 States is a romantic story of a Punjabi boy who falls in love with a Tamil girl, and the ensuing cultural clash between them and their families.
Directed by Abhishek Verma, 2 States is being co-produced by Sajid Nadiadwala, Karan Johar, Gauri Khan and Shah Rukh Khan.
The movie features Arjun Kapoor and Alia Bhatt in the lead roles.