The 74-year-old veteran actor posted the photos on his official blog and Twitter page.
"Back from work. It's late so, more tomorrow. "KBC" engaging well(sic)" Bachchan wrote on the microblogging site.
The actor has been associated with the quiz game for 17 years. The registration for the ninth season started back in June.
"KBC" first aired in 2000 and was hosted by Bachchan. It also marked his first appearance on Indian television.
The actor went on to host the second season of the show which went on air in 2005.
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