Sadhana Singh is an Indian film and television actor. Sadhana was born in rajput family Varanasi, Uttar Pradesh. Her family hailed from the Indian state of Punjab. Her first magazine shot was done by Pardeep Mishra. She started her film career with the 1982 film Nadiya Ke Paar, by writer-director Govind Moonis. Sadhana became a hit after the release of the film and started being called Gunja, the character she played in the film Nadiya Ke Paar. Gunja was an innocent looking village girl who fell in love with Chandan (Played by Sachin), brother-in-law of her elder sister, in the film. She has acted in more than twenty Bollywood and Indian regional language films. Goggles of Rajesh Khanna, Jugni and Mukkabaaz (by Anurag Kashyap) are some of her recent films. Apart from films, she also acted in many popular TV serials.

Personal life
She is married to film producer Rajkumar Shahabadi. Rajkumar is the son of Vishwanath Prasad Shahabadi - a film producer from Shahabad who was involved in producing Bhojpuri cinema's first film, Ganga Maiyya Tohe Piyari Chadhaibo. The couple have a daughter and a son. Her daughter Sheena Shahabadi is also an actress.