Imsai Arasan 23rd Pulikesi (transl. Pulikesi XXIII, the Tyrant ) is a 2006 Indian Tamil-language historical-comedy film written and directed by Chimbu Deven. The film stars Vadivelu in his debut as a solo lead actor. Monica and Tejashree play the female leads, while Manorama, Nassar, Ilavarasu, Sreeman and Nagesh play supporting roles. Sabesh–Murali composed the soundtrack album and background score. S. Shankar produced and distributed the film under his production banner S Pictures.

Set in the late 18th century during the early stages of the British Raj, the film tells the story of twin brothers separated at birth. Pulikesi XXIII, the foolish elder brother, becomes a puppet of his uncle, the Chief Minister, while Ukraputhan, the wise younger brother, becomes a patriot intent on saving his land and his brother.

Principal photography began in November 2005 at Prasad Studios. Imsai Arasan 23rd Pulikesi was released on 8 July 2006, and was the first historical Tamil film released since Madhuraiyai Meetta Sundharapandiyan (1978). The film received positive reviews, with critics praising the screenplay, the performances, and the dialogues. A box office success, the film won two Tamil Nadu State Film Awards and one Filmfare Award.