All India Anna Dravida Munnetra Kazhagam (AIADMK) party workers were seen celebrating at the party headquarters as initial trends showed the candidates of its alliance leading in the assembly by-polls on two seats.
The party leaders and workers also poured flowers and paid tributes over the statues of party stalwarts Jayalalithaa and MG Ramachandran.
AIADMK's V Narayana was leading in the Nanguneri assembly constituency with 24268 votes and DMK's R Manoharan is his closest rival with 15555 votes.
Twenty-four candidates had filed their nominations for the Nanguneri assembly constituency. Nanguneri seat went vacant after the sitting MLA Congress' H Vasanthakumar was elected to Lok Sabha.
In Vikravandi constituency, party's R Muthamilselvan was leading the race with 75867 votes and rival N Pugazhenthi's is trailing in the second spot with 46283 votes.
The voting for the two seats took place on October 21.