Nawazuddin Siddiqui in a still from Talaash.
"I will be meeting Rana who is in Tihar jail right now. Then I will get a clear picture about my character. So this is the only research that I will have to do to fit the bill," said the actor, who has received critical acclaim for his work in movies like Kahaani and Gangs Of Wasseypur.
End of Bandit Queen will be directed by the theatre director Barry John.
Nawazuddin recently shot for a biopic Mountain Man, on the life of Dashrath Manjhi, a Bihar-based labourer, who made a 360-foot-long road by physically cutting down a mountain.