This was Shailendra Singh's debut Hindi film as a playback singer.

It was only when Raj Kapoor relented and agreed to Lata's terms that she and Laxmikant - Pyarelal got back on board. It was because of this that Laxmikant - Pyarelal wanted to back out of the project - they did not want to record songs without Lata. According to her, she had initially refused to sing for the film since Raj Kapoor was unwilling to pay her the 2.5 per cent royalty she had asked for. Laxmikant - Pyarelal were reluctant to accept this engagement, but Lata Mangeshkar convinced them to sign up for the film. According to writer Raju Bharatan, while Laxmikant - Pyarelal recorded the songs of this film, their tunes were actually from a bank of Shankar - Jaikishan compositions Raj Kapoor maintained. Films production after the debacle of 'Mera Naam Joker' (1970) - 'Kal Aaj Aur Kal' (1971) - which Randhir Kapoor directed. Shankar - Jaikishan did, however, compose music for another R.K. Their partnership had started with 'Barsaat' (1949) and ended with 'Mera Naam Joker' (1970).

This was the first time in more than two decades that Raj Kapoor chose a music director other than Shankar - Jaikishan to compose music for a film he was directing.

She made a comeback to films with 'Manzil Manzil' (1984) more than a decade later, after she got separated from Rajesh Khanna.

She got married to superstar Rajesh Khanna a few months before the release of this film and retired despite its monstrous success. This was also the debut film of Dimple Kapadia.

He had debuted earlier in the film 'Mera Naam Joker' (1970).

This was Rishi Kapoor's first film in a lead role.

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