Prashanth Thiagarajan, known professionally as Prashanth, is an Indian actor and businessman, known for his works predominantly in Tamil cinema. Besides Tamil films, he has also appeared in few Telugu, Hindi and Malayalam films. At the peak of his career in the late 1990s, Prashanth was one of the popular actors in South India. He has won a Kalaimamani Award from the Government of Tamil Nadu. The son of actor-director Thiagarajan, Prashanth began his career at 17 by appearing in the Tamil film Vaigasi Poranthachu (1990) and went on to feature in other films including Balu Mahendra's Vanna Vanna Pookkal (1992), R. K. Selvamani's Chembaruthi (1992), K. Rushendra Reddy's Tholi Muddhu (1993), and Mani Ratnam's action-comedy Thiruda Thiruda (1993). Prashanth rose to stardom with Shankar's romantic comedy Jeans (1998) in which he played a dual role alongside Aishwarya Rai. The success of Jeans saw him garner opportunities to work in bigger film projects and in the late 1990s, he featured in a series of breakthrough films such as Kannedhirey Thondrinal (1998), Kaadhal Kavithai (1998), Jodi (1999) and Parthen Rasithen (2000).

The Kalaimamani is the highest civilian award in the state of Tamil Nadu, India. These awards are given by the Tamil Nadu Iyal Isai Nataka Mandram, a unit of the Directorate of Art and Culture, Government of Tamil Nadu, to recognise artists in the state for their achievements.