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Bachchan, 68, will host the show for the fourth time, which is scheduled to go on air from August 15.
"The second episode towards the evening will have invites to Saif and Deepika. Who come to promote their film and mine as well -`Aarakshan`!," wrote Bachchan on his blog.
"In many ways the philosophy of the film and that of KBC is quite similar. Given the opportunity, even the lesser privileged shall prosper. Or at least have the capacity to prosper," he added.
Directed by Prakash Jha, `Aarakshan` will see Bachchan portraying the role of Prabhakar Anand, a principal, who is against reservations in the education system. The socio-political film is set to release on August 12.