Harish officially made his debut into the music industry as a singer at the age of 21. His first song was a Telugu song for the movie Panjaram and he subsequently sung 'Vaa Saghi' for the movie Arasiyal which starred mega-star Mammootty as the hero. In the mean time, he graduated from Vivekananda College with a Degree in Commerce and Masters in Mass Communication & Journalism. He took up Software Engineering as well. Software Engineering would have been his main career if not for music. He re-entered the music industry through the well known classical song Nirpadhuve Nadapathuve from the movie Barathi. The music was composed by Ilaiyaraja. The song became a massive hit back in the year 2000 and it brought him fame along with Tamil Nadu State award. This was the time he changed his name from Harish to Harish Raghavendra, per Ilaiyaraja's recommendation. Before he could even join the software industry, Ye Azhagiye Theeye from Minnale scored a roaring success back to back. Since then, he has sung over 4000 songs for more than 200 movies. He has worked for most of the well known music composers that include Yuvan Shankar Raja, Vidyasagar, D. Imman, Vijay Antony, Harris Jayaraj & many others. His charming sharp voice has always been a point of attraction for many music directors, so he managed to sing in various languages such as Tamil (his main passion), Telugu, Kannada, Malayalam & Hindi. He has sung some devotional songs as well. After 'Panjaram', he sang for the Telugu film "Neetho' under Vidyasagar's baton. Since then he has sung many more songs in Telugu, including films like 'Cheli', 'Priyadarshini' and Ghajini. Harish has also done a number of live concerts in various countries as well. Lately, he also grabbed a Diploma in Yoga in Krishnamacharya style.