Amitabh says in the film that because of his voice he was rejected for a job at All India Radio; in reality, during his early days as a struggling actor, Amitabh Bachchan was also rejected by All India Radio for a job due to his voice.
Shamitabh was music director Illyaraja's 1000th film.
Shah Rukh Khan was director R. Balki's first choice (SHamitabh). Since Khan was unavailable, he went with Dhanush instead.
Dhanush's second Hindi language film after Ranjhanaa (2013).
Shamitabh is the first Bollywood movie to be shot in Finland. The shooting took place at Helsinki airport.