Prashanth (born in Chennai, Tamil Nadu, India) is an 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, Prashanth 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, R. K. Selvamani's Tamil-Telugu bi-lingual Chembaruthi and Mani Ratnam's action-comedy Thiruda Thiruda.
Prashanth rose to stardom with Shankar's blockbuster romantic comedy Jeans in which he played a dual role alongside Aishwarya Rai. In the late 1990s, he featured in a series of films such as Kannedhirey Thondrinal, Kaadhal Kavithai, and Jodi. His 2011 release Ponnar Shankar was based on the historical epic and became a semi-hit Prashanth also owns a multi-storeyed jewellery mart in Panagal Park.