Having fought a long legal battle to bring her sister's killer to book, Lall says the film immortalises Jessica and hopes murdered teenager Aarushi Talwar also gets justice.

"It was eerie... and very moving. We were all deeply relieved by how true to life the film has turned out," Lall said after watching a special screening for her in Delhi.

"When we agreed to let them make the movie, me and my family had been warned about the ‘Bollywood types'. We were told, ‘You don't know what you are getting into. Why have you given the NOC? Now they'll just do anything they like.' But watching the film I feel vindicated. It will make Jessica kind of immortal," she said.