Amitabh, the character draws from his real life experience where he was rejected by All India Radio due to his heavy baritone. In the movie he is rejected as an actor for the same reason.
While the shoot of the film was going on Amitabh Bachchan said in an interview that after watching the you will come to know why the film is titled Shamitabh .
Amitabh's sidekick (the cemetery helper/undertaker) does not sign the nondisclosure agreement and still listens to the deal shared by Akshara-Danish and Amitabh.