M. Karunanidhi

Muthuvel Karunanidhi, also known as Kalaignar, was an Indian writer and politician who served as Chief Minister of Tamil Nadu for almost two decades over five terms between 1969 and 2011. He had the longest intermittent tenure as Chief Minister of Tamil Nadu with 6,863 days in office. He was also a long-standing leader of the Dravidian movement and ten-time president of the Dravida Munnetra Kazhagam political party.