J Jayalalithaa, leader of All India Anna Dravida Munnetra Kazhagam, resigned as Tamil Nadu chief minister on Thursday, after her party was defeated in the Assembly elections.

The Dravida Munnetra Kazhagam-led Democratic Party Alliance is set to form the new government with M Karunanidhi as chief minister.

She sent her resignation to Governor S S Barnala through IT Minister D Jayakumar, AIADMK sources said.