Actress Priyanka Chopra said the role of 'Kashibai' in her upcoming film 'Bajirao Mastani' was very tough for her. Actress also said that she did this role just because of Director Sanjay Leela Bhansali. Priyanka said, 'I did this film because of Bhansali, I know Deepika is playing Mastani and Ranveer is playing Bajirao in this film. So, why I did this film?' Actress further said, 'Let me tell you that I am the first person who has signed this film first, I remember Bhansali had came to with the script and wanted that I will do this film.' According to Priyanka, She like this character. She said, 'This a female character and it is so tough for me. This film is very special for me and I very excited to be a part of it.' Priyanka will be seen in the character of first wife of Bajirao. The film will be released on 18th December 2015.