Longest production of a Bollywood film

Love and God (Qais aur Laila) (1986) took more than 20 years to make after running into a series of difficulties, including the deaths of lead actor Guru Dutt in 1964 and director K. Asif in 1971. The incomplete film was finally released in 1986, with Sanjeev Kumar taking over the lead role. K. Asif w also the director of Mughal-e-Azam (1960), which took more than 14 years to complete following the death of the lead actor Chandramohan. He was
replaced by Dilip Kumar.