Before rising to fame with 'Zanjeer' in 1973, Amitabh Bachchan was a struggling actor, even after appearing in Rajesh Khanna's 'Anand.' Writers Salim-Javed, impressed by Bachchan's talent, saw potential in him that others didn't. They firmly believed he was perfect for their 'Zanjeer' script, a role many actors had rejected due to its unconventional, intense nature.