The eighth legislative assembly election for Tamil Nadu was held on 24 December 1984. All India Anna Dravida Munnetra Kazhagam (AIADMK) won the election and its general secretary, incumbent M. G. Ramachandran (M.G.R) was sworn in as Chief Minister, for the third time. The election victory was mainly attributed to the sympathy wave created by Indira Gandhi's assassination and M.G.R's illness coupled with Rajiv Gandhi's popularity. This is the last election M.G.R contested as he died in office in 1987. This is also the only General Election which M. Karunanidhi did not contest since 1957 until his death. As of 2023, this is the last election where the ruling party gained seats.

Kalyanasundaram Anbazhagan was an Indian politician. He was a long-standing leader of the Dravidian movement and was the General Secretary of Dravida Munnetra Kazhagam party (DMK) for nine terms. He has held several cabinet ministerial portfolios in the Tamil Nadu government under M. Karunanidhi including Finance, Education and Health and Social Welfare. He was elected as a member of the Tamil Nadu Legislative Assembly on nine occasions. He was earlier elected to the Lok Sabha the lower house of India's Parliament from Tiruchengode and was also a member of the Madras Legislative Council. He served as the opposition leader of Tamil Nadu assembly from 2001 to 2006. He was popularly referred to as Perasiriyar (Professor) as he was a lecturer in Tamil in Pachaiyappa's College before resigning to contest elections in 1957.