Quiz

Feroz Khan was in the running for Manoj Kumar's role in the film. Manoj Kumar's close relationship with the producers made him the best choice.

The director of this film A.Bhim Singh, had become ill during the making of this film, then Dilip Kumar and Manoj Kumar directed this film toghether till it was complete, here Dilip Kumar knew that Manoj Kumar will become good and major director. After about 12 years, Manoj Kumar directed Dilip Kumar in Kranti. The same thing happened with Darinda, Sunil Dutt and Feroz Khan both directed the film till it was complete as the writer and director Kaushal Bharati was unwell.

The song Kaisi Baharon ki Raat is the only duet which Mohd Rafi and Mahender Kapoor sang together

Dharmendra was signed for the film but later replaced by Manoj Kumar.

Kaisi Haseen Aaj Bahaaron Ki Raat Hai This song was originally recorded by Talat Mahmood and Mohammed Rafi. According to some accounts, Manoj Kumar got Talat Mahmood's voice replaced with Mahendra Kapoor's voice in the film. This was the only time Rafi and Mahendra Kapoor sang together for a duet. However, according to Mahendra Kapoor's son Ruhan, his father was brought in since there was a consensus that Talat's voice did not suit the song. Mahendra Kapoor apparently sought Talat's permission to sing the song and the senior singer graciously acquiesced.