The BJP is contesting 27 seats in alliance with the All India Anna Dravida Munnetra Kazhagam (AIADMK) as part of the National Democratic Alliance (NDA)

AAP chief Arvind Kejriwal will campaign in Tamil Nadu on April 20 and 21 in support of the DMK and Chief Minister M K Stalin ahead of the Assembly elections. While AAP is not contesting, it has extended support to the Secular Progressive Alliance