P. Unnikrishnan (born 9 July 1966) is a Carnatic vocalist and a national award winning playback singer. He is a national award winning playback singer for his debut film song "Ennavale Adi Ennavale". The song was composed by A. R. Rahman, with whom Unni Krishnan gave most of his memorable songs. Unnikrishnan is also becoming known for his experimental work. In 2008, he presented a novel jazz concert in Trivandrum with the Eli Yamin Jazz Quartet and pianist Anil Srinivasan.
He prefers singing classical songs to movies.