Akkamappettai Paramasivan Nagarajan born on 24 February 1928 as Kuppuswamy. His father Paramasiva Gounder named him after the Lord of anger. A sign of misfortune, his parents died in the early childhood stages. Nagarajan's grandmother Manicka Ammal, guardian of the child Kuppu sent him to a drama company after knowing his interest in the field of Filmography. Around the time, when India was a free country, Nagarajan joined another drama company named Avvai T. K. Shanmugam's, for further assistance and learned the basics of acting. At Avvai T.K, Kuppuswamy became Nagarajan due to his acting style and thought process. In the late 40s, Nagarajan earned fame due to his debut role in the play "Gumasthavin Penn" and proved his artistic skills as an actor and gained vast audience for his career as an actor, director and writer as well.

In 1953 Nagarajan debuted Naalvar giving major roles to Kumari Thangam, N. N. Kannappa and Muthulakshmi in the film. It was a big hit and became a cult status in the tamil film industry. After acting in Mangalyam, Nalla,Thangal and Pennarasi,the Pazhani Kadiravan Nadaga Sabha, nagarajan's drama company came into existence. He became more focused on writing scripts rather than acting. After writing his debut film, Naalvar, Nagarajan focus shifted from acting to writing and made remarkable films with popular actors and famous director K.Somu. With his genre of mythological stories, he screenplay Karnan, the first of the mythology series that released in the 1960s. From “Rationalistic” dialogues to modern cinema cultures, Nagarajan was catching up in the early 50s to make a change towards modern cinema.

Karnan became a trendsetter and broke many records with its re-release to become the first Tamil classic which re-released in more than 70 centres across Tamil Nadu, captured 10 screens in Chennai City and celebrated its way up to 30 days in more than 30 centres across chennai and Madurai. Ipl and exams were also unable to stop the viewers to see Nagarajan's work in Karnan. His legendary work in Tamil film industry was Thillana Mohanambal, released on 27 July 1968 was critically acclaimed by many famous personalities for swiftly customizing the socio-cultural environment and showing the Thanjavur cultural dance and music which was trending at that period. It became a commercial success, to run for over 100 days in theaters. The film became a hit and big success at the box office and broke records of decades.

In 1968, Nagarajan earned many awards including Best cinematographer and won two national awards with five state awards as well. He started a trend of mythological movies in the industry and became inspirations for many new writers and directors due to his whole new different style of representation in the wide Tamil industry. A.P Nagarajan brought mythology back to the screens with his own stories and different cinematography patterns. He brought a change in thoughts of the people and varied the mindset of the generation with time. The director died in 1977 at Madras and won million hearts with his remarkable work and legendary personality.