The 69-year-old megastar is doing a cameo in the film, which marks the comeback of Sridevi, 48, known for films like "Nagina" and "Chandni" on the big screen.
"In Pune on set with Sridevi after ages... Perhaps 'Khuda Gawah'! Times a going going long," Big B posted on his Twitter.
"The shoot is simple, the shots uncomplicated and Sridevi is her usual best. God bless her," he posted on his blog.
The duo worked together in "Inqulaab" and "Aakhree Raasta".