The 73-year-old "Wazir" star said he feels blessed and retweeted many pictures posted by his fans from the film.
"Each day brings news of the years gone by in particular film and what it meant to all... Blessed!," he tweeted.
Directed by Chandra Barot, "Don" released in 1978 with Bachchan playing double role.
Written by Salim-Javed, the film also featured Zeenat Aman, Pran, Iftekhar, Helen and Om Shivpuri in pivotal roles.
Q-Your name cropped in Panama Papers case. Do
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controversies ruin things for you professionally and personally?
Personally, when a controversy erupts we decide first, whether it requires clarification and secondly, if it receives notice from authorities and the establishment, we submit responses to their queries.
In the matter under question, I have voluntarily given first, public clarification via 3 statements which are all with the media, both print and electronic and have, on receiving formal notices and summons from the GOI (Government of India) Department, given my responses, and I shall continue to give my full cooperation to them.
In any event, the press reports do not disclose any illegal act committed by me. The matter rests now with the GOI and they shall receive my fullest cooperation, Bachchan added.