Menon explained in an interview that, "The camera moves a lot; there would be long takes followed by three-four small cuts. It made lighting continuity easier for me and I was able to move fluidly." He said that Mani and him, both have a fascination for how Guru Dutt shot his song sequences. They were also inspired by Satyajit Ray's style.
The film's soundtrack sold 15 million units, becoming one of the best-selling film soundtracks of all time, and earning composer A. R. Rahman his fourth consecutive Filmfare Best Music Director Award (Tamil).
Nassar, a Muslim in real life, was cast as the father of Arvind Swamy's character (a Hindu) while Kitty, a Hindu in real life, was cast as the father of Koirala's character (a Muslim). Ratnam deliberately cast them in those roles as a statement.
When film director Mani Ratnam approached cinematographer Rajiv Menon to shoot Bombay, he described it as a film about the riots and said that he (Menon) needed to "make what came before the riots as beautiful as possible". So, Menon suggested shooting in the rains to achieve the effect. They shot the interiors of homes in Pollachi in Tamil Nadu and the exteriors were shot in Kasargod in Kerala.
Hip Hop artiste Ciara featuring Chris Brown sampled the song " Kehna Hi Kya" for their song " Turntables".