49-O is a 2015 Tamil political satire film directed by debutante P. Arokiyadoss, who previously worked as an assistant to Gautham Vasudev Menon. It stars legendary actor Goundamani in the lead role, while actors Thirumurugan, Guru Somasundaram, and Balasingh, among others, play supporting roles. Production began in December 2013. The film was released on 17 September 2015 on Vinayagar Chaturthi along with Maya and Trisha Illana Nayanthara and received mixed to positive reviews from critics.

Subramaniyan Karuppaiya, known by his stage name Goundamani, is an Indian actor and comedian who works in Tamil cinema. He is known for his comic duo partnership in Tamil films with fellow actor Senthil. The pair dominated the Tamil industry as comedians in the 1980s and 90s.