Harsha Thennakoon attended Bandaranayake Central College in Veyangoda during his schooling. He pursued an MA in Drama and Theatre Education and furthered his education at the Youth Center in Maharagama as well as the Somalatha Subasinghe Play House. He also studied at Nalanda College, Colombo, Sri Lanka, and obtained an external degree from the University of Kelaniya. Currently, he resides in Lappeenranta, Finland, and originally hails from Maradana.