AB Rishi Ranbir in Mehrunnisa

Circa 1983, Amitabh Bachchan and Rishi Kapoor shared screen space in Manmohan Desai's blockbuster Coolie. 28 years later, the stars will reunite for Sudhir Mishra's directorial venture Mehrunnisa.

And that's not all. The project produced by Nikhil Advani will also have the actors' sons Abhishek and Ranbir making cameo appearances, making it one of Sudhir's most ambitious project till date.

While Amitabh and Abhishek have worked together in films like Bunty Aur Babli, Sarkar and Sarkar Raj, Rishi and his son Ranbir have never shared screen space. "It is a script that Sudhir Mishra started writing in 1996. However, it failed to take off that time. Nikhil Advani was Sudhir's assistant back then. After all these years, Nikhil approached Sudhir and asked him to rework the script. Saurabh Shukla is writing the dialogues for the film," revealed a source.

Talking about the storyline, the source said, "The film starts off with two old men played by Amitabh Bachchan and Rishi Kapoor reminiscing about their past. Here is where Abhishek and Ranbir come in. They play their respective fathers' younger selves."

"Nikhil wanted to take this film on the floors this year. But both Ranbir and Abhishek are busy with other projects now. The film will go on floors only next year now," added the source.

When contacted, Nikhil Advani refused to comment on the project. Sudhir Mishra remained unavailable as well. "Neither Nikhil nor Sudhir want to talk about the project right now.

It's a huge project and they want to announce it in a big way later. Both Amitabh and Rishi have loved the script and agreed to do it. In fact, the film should also star Sudhir's favourite Chitrangda Singh," informed the source.

Though Amitabh and Rishi were a part of Rakeysh Omprakaash Mehra's Delhi 6, the actors did not share any screen space. They have earlier worked in super hit films like Amar Akbar Anthony and Kabhi Kabhi.

Big B and Rishi Kapoor were a part of Delhi 6 too, where the earlier did a guest appearance but did not share any screen space with Rishi. They have earlier been parts of superhit films such as Amar Akbar Anthony and Kabhi Kabhie.