Two songs in Kadhal, 'Unakkaga iruppen' and 'Thottu thottu ennai' were rendered by newcomer Harish Charan. He is a Chennaiite and an engineering graduate from MNM Engineering College, Chennai. He participated in Sapthaswaram programme conducted in Sun TV channel and the host A.V. Ramanan was impressed with the lad. He recommended him to Joshua Sridhar, the music director of Kadhal, who offered him an opportunity after the track test. The female voice in Thottu… is that of Harini Sudhakar, who is a student of Guru Nanak College, Chennai.