The film's story is set in the City of Joy and apparently shows the lives of two small time thieves who later get involved in the coal mafia.
"I am off to Kolkata tomorrow (Friday). The cast and crew of the film will join me there on Feb 12th and the major portion of the film will be shot there," Ali Abbas Zafar, who had earlier directed romantic comedy Mere Brother Ki Dulhan, told IANS.
"We shot a few portions here... we created a set and now we want to shoot the film in real locations. Fifty percent of the film is ready and the rest of the film will be widely shot in Kolkata," he added.
Gunday, featuring Arjun Kapoor, Ranveer Singh and Priyanka Chopra in the lead roles, will have a lot of action sequences and for that Ali Abbas Zafar needed the actors to look physically strong.
"Yes, we have worked a lot on physical aspect of Arjun and Ranveer. The film demand was for typical Indian actors and it is physically a very challenging role," said Ali Abbas Zafar.