Amitabh Bachchan gave a screen test for a film on the sets of Sajan. This was before Bachchan had signed any film. The screen test was arranged by Nargis Dutt.
Shatrughan Sinha made his debut in a small role. He stopped talking to star Asha Parekh because of a misunderstanding, and he continued to ignore her in their next film together Heera (1973). Many years later, he felt that his behavior was immature and recommended her to an important post. She called to thank him and they started talking again, and he said that she was "very gracious about it". In 2017, he attended the launch of her memoir "The Hit Girl".
Part of the film served as inspiration for Aamir Khan film Ghajini.
Shatrughan claimed he use to report to the sets at 7 am everyday. The stars use to stroll in at 12. The gurkha use to make fun of him always . It was then he promised that when he became a star he would never come on the sets on time. This thought process was due to revenge.
The Hindi films "Sajan" (1969), "Pasand Apni Apni" (1983) and "Ghajini" (2008), Jhoota Kahin Ka (1979) and the Malayalam film "Aram + Aram = Kinnaram" (1985) also used similar plotlines.