Kumaravadivel Natarajan, known professionally as Vadivelu, is an Indian film actor and playback singer. Since the 1990s, he has performed in supporting and lead roles as a comedy actor in Tamil films.
While having worked in more than 200 films, Vadivelu received awards in the Best Comedian category for his performances in Kaalam Maari Pochu (1996), Vetri Kodi Kattu (2000), Thavasi (2001), Chandramukhi (2005), Imsai Arasan 23m Pulikesi (2006), Marudhamalai (2007) and Kathavarayan (2008). His popularity led to his media-coined nickname, Vaigai Puyal, meaning "Vaigai storm", referring to the river that flows through his hometown Madurai.
Vadivelu was born as Kumaravadivel to his father Natarajan and mother Sarojini. He did not have a formal education, instead he worked in his father's glass cutting business and continued it with his brothers after his father's passing. In his free time, he participated in local stage plays, usually in a comic role.
Vadivelu met Rajkiran on a train while on his way to Chennai to visit his bride-to-be. Rajkiran later recalled that he was so amused by their conversation during the train ride that he agreed to give Vadivelu a role in his upcoming film, En Rasavin Manasile, directed by Kasthuri Raja.
Starting as a sidekick to the famed Goundamani-Senthil comedy duo, Vadivelu rose to prominence after his role in Kadhalan (1994), although his debut film was En Thangai Kalyani directed by T. Rajendar.