Mr Bachchan, 73, tweeted:
T 2131 - 25 years of HUM .. quite unbelievable time lapse .. !!!? Amitabh Bachchan (@SrBachchan) January 31, 2016
Directed by Mukul S Anand, Hum also starred Rajinikanth, Govinda, Kimi Katkar, Deepa Sahi, Shilpa Shirodkar, Danny Denzongpa, Anupam Kher and Kader Khan in pivotal roles.
Mr Bachchan, who was last seen in Bejoy Nambiar's Wazir, recently wrapped up Ribhu Dasgupta's Te3n.
Te3n also stars Vidya Balan and Nawazuddin Siddiqui.