Mumbai: Mouni Roy says her casting as the main antagonist in Ranbir Kapoor-Alia Bhatt-starrer "Brahmastra" came as a surprise for her. The 33-year-old actor, who made her Bollywood debut with Akshay Kumar's "Gold", says she wants make versatile choices. "I am playing the main villain in the film. I am really looking forward to it. What is more liberating for me is playing different characters that challenges me. I was surprised initially that they wanted me to play the villain."

"Ayan Mukherji (director) had seen something from 'Naagin' and felt I could play the villain. So you never know what clicks with whom. As an actor you should be willing to experiment and be versatile otherwise you can't learn and grow," Mouni told PTI.


"Brahmastra" also featuring megastar Amitabh Bachchan, will serve as the first film in the trilogy. Mouni says working with the team has been an enriching experience.

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"My life is fulfilled after working with Mr Bachchan. Ranbir and Alia are sweethearts, they are too good. They all are such big stars that you get scared walking on the sets.

"They all have been so generous, welcoming and made me feel comfortable. With great success and talent they als have that humility and are accepting people from outside," she adds.

"Brahmastra", produced by Karan Johar's Dharma Production, will release on December 20.

Mouni will be seen next in "RAW: Romeo Akbar Walter" opposite John Abraham. The film releases on April 5.