Bahl, who hails from a family of actors, is the son of late Bollywood actress Nutan.
He is the grandson of the late actress Shobhna Samarth, nephew of actress Tanuja and cousin of actresses Kajol Devgan and Tanisha Mukherjee.
Bahl, best known for his roles as a supporting actor in several films including 'Maine Pyar Kiya', 'Raja Hindustani', 'Hum Saath-Saath Hain: We Stand United', 'Vivaah', 'Hum Aapke Hain Koun. . !', has also acted in few television projects.
The actor has been more successful in the television industry for his roles as Dr. Shashank Gupta in 'Sanjivani - A Medical Boon' and 'Dill Mill Gayye', and as Inder Shah in the serial 'Kayamath'.
The actor was last seen in Sony Entertainment Television channel's popular show 'Kuch Toh Log Kahenge', where he portrayed the role of Dr. Ashutosh.
Mohnish Bahl has also anchored a game show named 'Bachke Rehna Zara Sambhalke' and 'Star Vivaah'.
The actor married actress Ektaa (Aarti Bahl) and have two daughters named Pranutan and Krishaa.