Nawazuddin Siddiqui has been roped in to play Manto in the film which will trace the author's life, his relationship with his wife and his life post Partition in Lahore.
Rasika says she was very impressed with the research that Nandita has done to bring Manto's story to life on the big screen.
"According to Nandita's research Manto was a very doting husband. You don't think of Manto like that. You don't think of him domestically at all. That is an interesting aspect. He bounced off a lot of work from her and she helped him with his writing," Rasika told PTI.
Rasika was offered the role after Nandita watched her in a play "Bombay Talkies", which was part of the director and her husband Subodh Maskara's initiative Cineplay.
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It was after watching Rasika's moving performance in "Qissa" that Nandita made up her mind to cast her as the leading lady of her much-anticipated biopic.
Rasika is currently prepping for her role in the film,
which will go on floors in November this year. She is also looking forward to start working with Nawaz.
Rasika has been a part of the Hindi film industry since 2007 but it was only after "Qissa" that she got recognition.
The actress says after the release of the Anup Singh-directed film, for the first time in her career she got a call from a director who offered her a film.
However, Rasika feels that the film did not get the due that it deserved as it got a very small release.
"I feel that the release did not do justice to the film. It did not get its due. That was the only disappointing thing. I keep telling Anup that 'you have spoilt me for life'."
"I had a wish-list of actors I wanted to work with and half of that is done."
Besides her film commitments, Rasika is doing Nikhil Advani's TV show which is based on "Homeland".