Vidya Balan and Rani Mukerji had to shoot in old Delhi's crowded areas for No One Killed Jessica. But how could that possibly happen without a mob surrounding them when Rani and Vidya are both such popular names?

Director of the film, Rajkumar Gupta, who earlier made the Rajeev Khandelwal starrer Aamir, wanted to shoot the film on real lanes with hidden cameras. He wanted to shoot Vidya and Rani as part of the crowd to give an authentic feel to the film.

He did the same thing with Rajeev while shooting for Aamir in Mumbai. The candid shots with hidden cameras give a better look to the scene. He hadn't realized the security risk he was undertaking when he asked Rani and Vidya to do it the same way.

He wanted to shoot in jam-packed lanes where vans wouldn't be able to reach and not usual areas like Chandni Chowk. But he was suddenly very unsure of his plan when they reached the location in a van.

He reveals that he was only able to do the shoot only because they assured him. The two actresses got into the crowd and shot for a while until people began to recognize them.

Before the problem got out of hand, they would rush into the van and then leave for another place in old Delhi.