Directed by Karan Lalit Butani, "Kwatha" is based on true events involving the Indian Army.
"Isabelle Kaif and Aayush to star in a film inspired by true events involving the Indian Army in 'Kwatha'," Salman tweeted.
Aayush will be essaying role of an Army officer, for which he underwent intensive training to get the physique and look right. Details of Isabelle's role are kept under wraps at the moment.
"We are excited to announce Aayush Sharma and Isabelle Kaif as the leads of 'Kwatha'. 'Kwatha' is a village on the border of India and Myanmar. While it is based on true events, the plot is unconventional," Butani said.
To this, producer Aditya Joshi of Cult Entertainment added: "When we first heard 'Kwatha', we realised it's a different film which showcases the heart of the Indian Army."
The actors are currently undergoing intensive workshops for the film. They will soon be visiting places in the northeast for more research. "Kwatha" is expected to go on floors in September this year and is slated to release in 2020.
Presented by Purple Bull Entertainment and Cult Entertainment, the film is backed by Sunil Jain, Omprakash Bhatt, Aditya Joshi, Alok Arbind Thakur and Sujay Shankarwar.
( With inputs from IANS )