He was introduced to the Tamil Cinema as a Singer by the successful duos Gautham Vasudev Menon and Harris Jayaraj in Vettaiyaadu Vilaiyaadu for the song "Manjal Veyyil".

[3] He also completed an acting course at the New York Film Academy and performed at the Broadway in a Walt Disney production of Aladdin, before arriving in Chennai, hoping to get a breakthrough in the industry as an actor.

[4][5] During the initial months of his return to Chennai, Krish participated in stage shows and cultural events as a singer and was recruited by composer Ganesh Kumar to sing a western song for an album.

[6] Krish then made his playback singing debut in Tamil films by rendering the song "Manjal Veiyil" from Vettaiyaadu Vilaiyaadu (2006), composed by Harris Jayaraj, alongside Hariharan.

Producer Ibrahim Rowther spotted Krish in the song "Aga Naga" and offered him the chance of portraying the lead role in his production Puriyadha Anandam Puthithaga Arambam.