Taarak Mehta ka ootah chashmah is arguably the most successful comedy show today. The popularity of the show can be gauged from the fact that reputed stars aren’t hesitating in making a guest appearance on this SAB TV show. After Raju Srivastava, Dinyar Contractor and Shreyas Talpde it’s now Bollywood superstar Ajay Devgan who is making a guest appearance in the Diwali special episode. Devgan will be promoting his upcoming film All the best. The actor has shot today. Initially, Devgan’s track was to be something like this – “It so happens that Devgan’s car breaks down near Gokuldham society and Roshan Sodhi (Gurcharan Singh) happens to spot the vehicle and to his surprise, he finds Ajay Devgan in it. Devgan gets his car repaired at Sodhi’s garage but not before he interacts with all the members of Gokuldham society. This was to be shot yesterday but the incessant rains resulted in the cancellation of this track.,” said a source. When contacted, Gurcharan Sing refused to comment anything. Confirming the news, producer Asit Modi says, “Yes, Ajay Devgan has shot for us today. However, I can’t reveal about the track surrounding his entry. All I can say is that there’s a mystery attached to it. These episodes will air on 14 and 15 October.”