"Today being the first day for filing of nominations, 63 persons have filed their nominations for the General Elections to Lok Sabha," a release from state Chief Electoral Officer said here.
Aiyar, now a Rajya Sabha member, filed his papers from Mayiladuthurai constituency in the Cauvery delta region.
Udayakumar, who has been spearheading the protests against the Kudankulam Nuclear Power Plant in Tirunelveli District for nearly three years , filed his nomination from neighbouring Kanyakumari constituency.
In Madurai, CPI-M candidate D Vikraman filed his nomination papers. Besides, a number of independents also filed nominations.