Manish discovered his love for acting as a 15-year-old school boy attending St. Paul's School in Darjeeling. After school and while he was completing his B.A. Hons.(English) at Kirori Mal College, Delhi University he joined College Theatre Society.
In 1995 Manish left Delhi and made Mumbai his home, looking for a career in Hindi Cinema. He made his film debut in the 2003 Indian film Rules: Pyaar Ka Superhit Formula.