"To learn a new sport and to get her body language, I don't know how am I going to do this. I have never played sports in my life. This is my hardest film," said Priyanka.
Priyanka has been working hard to perfect herself for the role. She even visited Imphal to meet Kom and the place where the boxing champ practises.
The 31-year-old believes this biopic, directed by Omung Kumar and produced by Sanjay Leela Bhansali, will be different.
"Most of the biopics are of persons who are either no more or seniors. But Mary is 32 years old and an international icon. It's a very difficult film. I want to show her personality in the film," she said.
Priyanka's forthcoming films also includes "Zanjeer", a remake of megastar Amitabh Bachchan's 1973 film of the same name. This is the third remake of a Big B-starrer that Priyanka features in.
"Mr. Bachchan is my favorite actor. I am glad I have been a part of his remake films. I think its a co-incidence," she said.
Earlier, she was seen in the remake of Amitabh's "Don" and "Agneepath".
The new "Zanjeer", directed by Apoorva Lakhia, releases Sep 6. It features southern star Ram Charan Teja in the lead.
