Conjeevaram Natarajan Annadurai (Tamil: காஞ்சீபுரம் நடராஜன் அண்ணாதுரை) (15 September 1909 – 3 February 1969), popularly called Anna (Tamil: அண்ணா, “elder brother"), or Arignar Anna (Anna the scholar) was a former Chief Minister of the South Indian state of Tamil Nadu. He was the first member of a Dravidian party to hold that post and was also the first non-Congress leader to form a majority government in independent India.
He was well known for his oratorical skills and was an acclaimed writer in the Tamil language. He scripted and acted in several plays. Some of his plays were later made into movies. He was the first politician from the Dravidian parties to use Tamil cinema extensively for political propaganda. Born in a middle class family, he first worked as a school teacher, then moved into the political scene of the Madras Presidency as a journalist. He edited several political journals and enrolled as a member of the Dravidar Kazhagam. As an ardent follower of Periyar E. V. Ramasamy, he rose in stature as a prominent member of the party.