Dilip Kumar was to do the role which Raaj Kumar did. Kamalhasan and Sarika met on the sets of this film then they got married.
Kamalhassan met his future live-in girlfriend Sarika on the sets of this movie. They had two children before they separated.
Raaj Kumar Kohli wanted Feroz Khan for the film. But after Qurbani he had become untraceable and unreliable. Kohli needed immediate dates and full attention for his film. Feroz Khan was now not interested in signing outside productions. The role eventually went to Sunil Dutt.
Raaj Kumar Kohli initially wanted Jeetendra for the film. But due to problems with Jeetendra during Badle Ki Aag,Kohli, decided to cast Kamal Haasan instead.
Ranjeeta Kaur accepted the film due to feeling bad for turning down Jaani Dushman.