The model-turned-actor will be seen with Mugdha in the Marathi remake of the Anil Kapoor-starrer Laadla.
Mithun was earlier seen in forgettable flicks like Mumbai Godfather. He is also a fitness expert and global trekker.
Photos: Kareena Kapoor Khan, Kangana Ranaut at the Mumbai airport
Photos: Virat Kohli-MS Dhoni's bromance, Team India in LOL mode
Bollywood celebs show you colours for Navratri 2017
Birthday special: Chris Gayle and his multiple records in cricket
In Pictures: 17 dreaded on-screen villains of Bollywood