Guru Dutt's Pyaasa was initially titled " Kashmakash".
Stardust magazine ran a story that Feroz Khan approached Asha Sachdev and told her "Look baby, you might be my sister in the movie, but not in real life". Then proceeded to take her in a locked up in the film studios, only to emerge hours later.
Credits were shown after more than 30 mins of the movie.
Based on James Hadeley Chase novel " Tiger By The Tail". The same subject was later remade in Akalmand (1984) Kaun Kaisey (1983), Karishma (1984) and 88 Antop Hill (2003).
Shatrughan Sinha had Faryal replaced with Asha Sachdev.