Imtiaz Ali: 'Nobody like Amitabh Bachchan, never will be'. Filmmaker Imtiaz Ali wishes Amitabh Bachchan on his 84th birthday, calling him irreplaceable. Ali, speaking at Whistling Woods' 'Celebrate Cinema '26' festival, said he considers himself fortunate to have been born in the Bachchan era. He also expressed hope to collaborate with the legendary actor on a feature film someday.