Radhaiyin Kadhal is a 1940 Indian Tamil film produced by Lakshmi Cinetone and directed by A. P. Kapoor.
The film was produced in Telugu with the title RadhaKrishnan, at Hans Pictures Studios in Kolapur.
The music for the lyrics was composed by H. R. Padmanaba Sastry while the background music was scored by Dada Sandekar.
Lyrics were penned by P. Hanumantha Rao, with most of the songs sung by K. Thavamani Devi set to Carnatic music tunes.