Thirumavalavan (born 17 August 1962) is an Indian politician and Tamil activist, Member of Parliament in 15th Lok Sabha and the current President of the Viduthalai Chiruthaigal Katchi party in the state of Tamil Nadu in India.
He rose to prominence in the 1990s as a Dalit leader, and formally entered politics in 1999.
His political platform centres on ending the caste-based oppression of the Dalit, which he argues can best be achieved through reviving and reorienting.
He has also expressed support for Tamil nationalist movements and groups elsewhere.
He did his Bachelor's course in chemistry, master's degree in Criminology and pursued law at Madras Law College.
He completed his Ph.D at Manonmanium Sundaranar University and was awarded his doctorate in 2018.
He worked in the government's Forensic Department as a scientific assistant, from which he later resigned in 1999 to contest polls.
He contested the 1999 and 2004 general elections unsuccessfully and won the 2009 general elections from the Chidambaram constituency.
He won the 2001 state assembly elections in alliance with Dravida Munnetra Kazhagam (DMK), a post from which he resigned in 2004 quoting ideological differences with DMK.
He is an author, and has also acted in Tamil cinema.
His confrontation with Pattali Makkal Katchi and its leader Ramadoss has resulted in frequent clashes between Dalits and the Vanniyars.
Both parties have accused each other of instigating violence against the other community.
Both Thirumavalavan and Ramadoss reconciled their differences and worked together during the period of 2004 to 2009, when they were part of the same electoral alliance.