Baddaliyanage Don Joseph John (14 April 1915 – 11 April 1981: Sinhala:සුනිල් සාන්ත), popularly known as Sunil Santha, was a renowned and influential Sri Lankan composer, singer and lyricist. He was pivotal in the development of Sinhala music and folk songs in the mid to late 1940s and early 1950s. He composed the beloved soundtracks to Lester James Peries' films Rekava and Sandesaya in 1956 and 1960. In a later comeback, he produced several experimental works.