There is absolutely no denying the fact that Amitabh Bachchan is one of the most revered actors in Bollywood and the many birthday wishes on social media are a mere example. As the actor celebrates his 78th birthday, fans have bombarded social media with greetings for the Bollywood veteran. Big B, in his latest Instagram post, thanked his fans and well-wishers for their love and wrote about the "greatest gift" that he received from his fans. "Your generosity and love be the greatest gift for me for the 11th .. I cannot possibly ask for more," wrote Amitabh Bachchan.