<page_title> List of Chief Ministers of Tamil Nadu </page_title> <section_title> Tamil Nadu </section_title> <table> <cell> 7 <col_header> # </col_header> <row_header>  </row_header> </cell> <cell> O. Panneerselvam MLA for Periyakulam <col_header> Name </col_header> <row_header>  </row_header> </cell> <cell> 21 September 2001 <col_header> Took office </col_header> <row_header>  </row_header> </cell> <cell> 1 March 2002 <col_header> Left office </col_header> <row_header>  </row_header> </cell> <cell> (7) <col_header> # </col_header> <row_header>  </row_header> </cell> <cell> O. Panneerselvam MLA for Bodinayakkanur <col_header> Name </col_header> <row_header>  </row_header> </cell> <cell> 29 September 2014 <col_header> Took office </col_header> <row_header>  </row_header> </cell> <cell> 22 May 2015 <col_header> Left office </col_header> <row_header>  </row_header> </cell> <cell> (7) <col_header> # </col_header> <row_header>  </row_header> </cell> <cell> O. Panneerselvam MLA for Bodinayakkanur <col_header> Name </col_header> <row_header>  </row_header> </cell> <cell> 6 December 2016 <col_header> Took office </col_header> <row_header>  </row_header> </cell> <cell> 15 February 2017 <col_header> Left office </col_header> <row_header>  </row_header> </cell> </table>
O. Panneerselvam served as the 7th Chief Minister of Tamil Nadu in 2001-02, 2014-15, and from 6 December 2016 to February 2017.