O. Panneerselvam is an Indian politician known for his association with the AIADMK party in the state of Tamil Nadu. He served as the Chief Minister of Tamil Nadu multiple times, first taking office in 2014 after the death of former Chief Minister Jayalalithaa. His leadership was marked by efforts to maintain party unity and governance during challenging times. Panneerselvam, often referred to as "OPS," has a background in grassroots politics and has held various positions within the AIADMK. He is recognized for his loyalty to the party and its late leader, Jayalalithaa, and has played a significant role in Tamil Nadu's political landscape over the years.