Bollywood megastar Amitabh Bachchan is celebrating another social media milestone after crossing the 20 million followers mark on Facebook. The 72-year-old actor is very active on various social media sites and regularly engages with his fans through his twitter page, blog, and Facebook account. “Yes it is 20 million on Facebook and it could never have been possible were it not for the affection of those that are at this very moment reading this transcript! “Thank you all. I survive another milestone,” Bachchan posted on his blog. The actor has 13.7 million followers on twitter.