Saurabh shared a caricature on Twitter which showed the 53-year-old star on a judge's chair and actors Akshay Kumar and Annu Kapoor as lawyers.
"Started shooting 'Jolly LLB 2'," Saurabh tweeted on Monday.
The sequel will reportedly be shot in Lucknow and Varanasi, as also in.
The 2013 film, directed by Subhash Kapoor, told the story about Jolly, a struggling lawyer, who comes upon a hit-and-run case and decides to fight for the victims.