"We have made this true to the heart. We have followed the exact story of what Dalbir (Kaur)(Sarabjit's sister) has told us," Omung said when asked if he has taken any creative liberty for the film.
"Emotions run high as we see in the trailer. We knew very less about Sarabjit (and) only what Dalbir (Kaur) told us," he told reporters here at the trailer launch of "Sarbjit".
The movie, starring Aishwarya Rai-Bachchan, Randeep Hooda, Richa Chadda, Darshan Kumar among others, is based on Indian convict Sarabjit Singh, who died following an assault by fellow prisoners at a Pakistani jail.
Initially, Omung was not that keen to direct another biopic but the story of Sarabjit and Dalbir made him say yes to the project.
"Sandeep Singh (producer) came to me with this idea. I was mesmerised with the story as it was a hard hitting story. People know the story but not its depth," the filmmaker added.
Aishwarya is playing Sarabjit's sister Dalbir while Randeep Hooda will be seen in the titular role in the film slated to release on May 20.
