Super star Amitabh Bachchan is going to celebrate his 70th birthday tomorrow. A grand celebration is going to take place for the veteran actor, who will turn 70 on October 11th. His wife Jaya Bachchan is hosting a formal dinner on October 10th with invited guests from the film fraternity, political leaders and few friends from close circle. Chiranjeevi and Nagarjuna are currently in Mumbai to personally wish Amitabh Bachchan. B A Raju tweeted: “Big B becomes 70 Tomorrow. Chiru and Nagarjuna went to wish him.” They might also probably attend the dinner party tomorrow night.