Kulamagal Radhai is a 1963 Indian Tamil-language romance film directed and written by A. P. Nagarajan.
The film is based on the novel Vaazhvu Engey by Akilan and stars Sivaji Ganesan, B. Saroja Devi, and Devika in lead roles.
Radhai falls in love with Chandran and they plan to get married, but her sister-in-law Vanaja intervenes, convincing Radhai not to elope, which leads to a rift between Radhai and Chandran.
The film was released on June 7, 1963, and was produced by Sp. A. P. Nagarajan also wrote the screenplay for the movie.
