Prashanth Thiagarajan (born 6 April 1973) is a Chennai-born Indian film actor known for his works predominantly in Tamil cinema. He has also appeared in few Telugu films, Bollywood and Malayalam films. The son of actor-director Thiagarajan, he began his career at 17 by appearing in Vaigasi Poranthachu and went on to feature in other films including Balu Mahendra's Vanna Vanna Pookkal (1992), R. K. Selvamani's Tamil-Telugu bi-lingual Chembaruthi (1992) and Mani Ratnam's action-comedy Thiruda Thiruda (1993).