"I believe there is no age limit to work. But these days I'm not keeping well," Hangal said.
Talking about the show, he said, "I am feeling great about it. For past few years I have not worked, but I have done a small role in the serial."
He has been active in filmdom since 1967 and played on-screen father, grandfather, great-grandfather and uncle to many top notch Bollywood actors, but two years ago Hangal - the famous Rahim Chacha of 'Sholay' - was struggling for his life as his source of income had dried up and there was hardly any money for food or medicine.
But his son Vijay, 75, says that now they are doing fine.
"Financially we are doing fine. We keep getting help from people from the film fraternity. There are a lot of people from the industry who are our well-wishers. We also get help from welfare trust. Right now we are not facing any financial problem," he said.
Prashaant Bhatt, concept head of 'Madhubala', says that he thought about A.K. Hangal for the show because the serial is a tribute to 100 years of Indian Cinema.
"As we have mentioned earlier that 'Madhubala' is a tribute to 100 years of Indian Cinema. Mr. A.K. Hangal has been part of the industry for such a long time and his presence made a huge difference to us. In fact, his blessings matter a lot," said Bhatt.
He was initially sceptical about Hangal accepting the role, but the senior actor's enthusiasm proved his worries wrong.
"Very frankly, he was super excited to do the role. He is 97 now and he has not been keeping well, so we were sceptical whether he would agree to do the role. But when we spoke to him, he said when and where to come for the scene and what will be my role," added Bhatt.
"He comes to the set, looks around and with his gentle voice he calls - 'makeup man'. Once an actor always an actor. It was an honour to have him on the show," he added.
'Madhubala' went on air Monday and it tells the story of a girl who is forced into the world of showbiz. Drashti Dhami plays the title role and the cast also includes Vivian D'sena, Raj Zutshi and Shagufta Ali.