Aishwarya Rai Bachchan shared an unseen photo of Amitabh Bachchan with granddaughter Aaradhya on Instagram, wishing him 'Happy Birthday dearest Pa-Dadajiii.' Amitabh turned 84 on October 11 and greeted fans outside his Mumbai residence in a maroon kurta. Wishes also poured in from Kamal Haasan, Chiranjeevi, Kajol, and others.