The first time of anything is kind of hard to forget. Parwana was such a film for Amitabh Bachchan. A future superstar then had never done a negative role before. He played a negative character in this film in 1971 for the first time and after that he played a negative again after 31 years in Aankhen (2002). Not only that, but also this was the first film Amitabh had to sing and dance in. He found it extremely difficult.