Kailayar Sellanainar Sivakumaran (also known as K. S. Sivakumaran; (October 1, 1936 - September 15, 2022) is a Sri Lankan Tamil writer, art & literary critic, Journalist and radio & TV personality. He writes and broadcasts both in Tamil and English. Sivakumaran was born in Singalavadi, Puliyantheevu, Batticaloa City in the Eastern Province of Sri Lanka. He had his early education at Aanaipanthy Boys’ School and St. Mary's Practicing School, St. Michael's College (then managed by North American Jesuits) and Government College all in, Batticaloa from 1947 to 1953. The family migrated to Colombo in October 1953. In Colombo; he studied up to the University Entrance Class (known as HSC) at the Colombo Hindu College (Bambalapitiya and Ratmalana) and at St. Joseph's College, Darley Road. He continued his education as an external student and graduated in English, Tamil and Western Classical Culture from the University of Peradeniya.