Amitabh Bachchan Birthday : Bollywood Mega Star Amitabh Bachchan is celebrating his 70th birthday on October 11. Amitabh has invited many film industry people for his birthday bash tonight and among them are Mega Star Chiranjeevi, Ram Charan and Rana Daggubati. Amidst his hectic political schedule, Chiranjeevi has left to Mumbai to attend the birth bash of Amitabh Bachchan as the actor share a very close relationship with Big B. Rana Daggubati has confirmed this news on a social networking site stating “Now headed to Mumbai for the celebrations of the @SrBachchan's 70th , Flew in with the Megastar himself Mr.Chranjeevi on board with me. :-)) ”.