abuses Kannamma for her shameless life. Ramalingam observes that even in such a humiliating situation, Kannamma is silent and does not breathe a word about her promise to him. He is moved and acknowledges her as his daughter-in-law. Selvam is united with his parents, and Raja's marriage with Maduram is cancelled. Cast Gemini Ganesh as Rajalingam Savithri Ganesh as Kannamma Kamal Haasan as Selvam T. S. Balaiah as Ramalingam S. V. Subbaiah as Murugan Javar N. Seetharaman as Singaram V. R. Rajagopal as Rathnam Devika as Maduram L. Vijayalakshmi as a dancer S. A. Ashokan as Mayor (guest appearance) Manorama as Amalu Production Development After assisting A. V. Meiyappan in producing films for AVM Productions, his sons Saravanan, Murugan, Kumaran discussed producing one on their own with his son-in-law Arun Veerappan. Their mother Rajeswari told Meiyappan about this, and he gave his consent. The first story the brothers discussed was Maanam Periyadhu, but it did not shape up well. Unwilling to make a half-baked story as their inaugural production, Saravanan continued searching. Vellaichaami, an ex-employee of AVM, told Saravanan that Javar Seetharaman had been discussing a story with Meiyappan. Saravanan inquired further and learned that the story was Pattuvum Kittuvum. However, Meiyappan told Seetharaman that while the story was good, AVM could not film it. When Saravanan and his brothers learned that Seetharaman was in discussions with another production company, they ran to Meiyappan and told him that they were interested in Seetharaman's story; to their relief, Meiyappan revealed that Seetharaman would be visiting him that afternoon. After Seetharaman realised that Saravanan and his brothers were interested, he willingly gave them his story, which evolved into Kalathur Kannamma. Impressed with T. Prakash Rao's work in Amara Deepam (1956) and Uthama Puthiran (1958), Saravanan and his brothers considered he would be best to direct Kalathur Kannamma. This decision was questioned, given that AVM had its own "director unit" of which Prakash Rao was not a part. Though AVM paid its directors salaries ranging from to , Prakash Rao charged —twice as much. Meiyappan, not wanting to be an obstacle to his sons' enthusiasm, approved Prakash Rao's salary. Despite Saravanan's desire, the credit of producing the film was given to Meiyappan, Kumaran, and Arun Veerappan. The story by Seetharaman was loosely adapted from two sources: the play The Forgotten Factor by the Moral Rearmament Army, and the 1960 Chinese film Nobody's Child.