DMK will face archrival AIADMK in the April 24 Alandur bypoll, fielding local strongman R S Bharathy, who is also the party's legal wing secretary.
DMK chief M Karunanidhi named Bharathi as the party's choice at a press conference here while announcing the list of 35 candidates for the Lok Sabha polls.
The by-election to the constituency will be held simultaneously with the Parliamentary polls.
AIADMK chief J Jayalalithaa had last week announced V N P Venkataraman as her party nominee for the Alandur seat.
The bypoll was necessitated following the resignation of former DMDK leader 'Panrutty' S Ramachandran who had also quit the Vijayakanth-led party recently before joining AIADMK.
Bharathy, a former Chiarman of Alandur Municipality, had unsuccessfully contested the 2009 Lok Sabha polls from South Chennai on a DMK ticket. He had lost to AIADMK's C Rajendran then.
DMK and AIADMK had earlier faced off in the Yercaud (ST) bypolls in December 2013, which the latter won.
