The unique initiative has been launched by micro-blogging site Twitter and Fluence, India's leading Celebrity Digital media network which connects celebrities with their fans and brands through their digital presence.
"Every year on my birthday I am overwhelmed by love and affection that I receive from my fans, from across the world. This year with the help of Twitter and Fluence, I have found this unique way to reciprocate the love, even though the message is communicated through a digital medium for me it is as personal as wishing each individual myself," Bachchan said in a statement.
"Mr Bachchan is the most followed person on Twitter in India and he has been setting standards in using Twitter to connect with fans in real-time and sharing his voice on the platform.
"We are delighted to host his birthday celebration on Twitter and bring a new experience to his millions of fans and followers," said Rishi Jaitly, Market Director, South and Southeast Asia at Twitter.
Bachchan's fan just needs to send him hashtag #AB72Wishes for digitally signed poster and the lucky one will receive a video message from the actor.
"Mr Bachchan is one of India's most loved stars, the love and devotion he inspires in his fans is unprecedented," said Ashish Joshi, VP Digital & Business Head - Fluence, adding it was Big B's way of thanking "his millions of fans for their love and affection.
