Karan announced the news on his Twiiter account on Monday, along with an image of himself with Varun and director Shashank Khaitan.
He wrote : "So proud to announce 'Rannbhoomi'... Shashank Khaitan and Varun Dhawan take a giant leap in their third offering together. A solid spectacle with a beating heart. Diwali 2020 release. Remaining lead cast to be announced soon! DharmaMovies, Apoorva Mehta."
Khaitan has earlier directed Varun in two films for Karan's Dharma Productions - "Humpty Sharma Ki Dulhania" and "Badrinath Ki Dulhania".