प्रशांत त्यागराजन, जिन्हें पेशेवर रूप से प्रशांत के नाम से जाना जाता है, एक भारतीय अभिनेता और व्यवसायी हैं, जो मुख्य रूप से तमिल सिनेमा में अपने काम के लिए जाने जाते हैं। उन्होंने तमिल फिल्मों के अलावा कुछ तेलुगु, हिंदी और मलयालम फिल्मों में भी काम किया है। प्रशांत 1990 के दशक के उत्तरार्ध में दक्षिण भारत के लोकप्रिय अभिनेताओं में से एक थे ।

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).