Sushant Singh is an Indian character actor, television actor, author and presenter known for his works predominantly in Hindi cinema, and Telugu cinema. He made his screen debut in 1998 with Ram Gopal Varma's Satya. He was then starred in Jungle (2000), receiving critical acclaim for portraying slain bandit Durgaa Narayan Chaudhary, winning the IIFA Award and Zee Cine Award for Best Performance in a Negative Role.

Kaun? (transl. 'Who?') is a 1999 Indian Hindi-language psychological suspense thriller film directed by Ram Gopal Varma, written by Anurag Kashyap and starring Urmila Matondkar, Manoj Bajpayee and Sushant Singh. It was shot in 15 days. The film was dubbed into Telugu as Yevaru?. The film was remade into Kannada as Shock (2010).