Amitabh, who got the "angry young man" image from the film, took to Twitter on Monday to share the news with his fans.
"42 years of 'Deewar'. The best screenplay ever! And 100 weeks trophy, compared to the weeks of today's films. Times change," Amitabh tweeted.
"Deewaar" tells the story of two brothers who, after their family is betrayed by the misplaced idealism of their father, struggle to survive on the streets of Mumbai.
The film also featured Shashi Kapoor, Parveen Babi, Neetu Singh and Nirupa Roy.