The thirteenth Kerala legislative assembly election was held on 13 April 2011 to elect members representing 140 constituencies in Kerala. Election results were released on 13 May 2011. The election, whose results were released on 13 May 2011, proved to be one of the closest ones in Kerala's history, with the United Democratic Front (UDF) beating the Left Democratic Front (LDF) by a margin of 4 seats. Oommen Chandy was sworn in as the Chief Minister for the second time on 18 May 2011.