Cheewin "Boyd" Kosiyabong (Thai: ชีวิน (บอย) โกสิยพงษ์) is a Thai songwriter, singer and music producer of the R&B genre whose inspirational songs and romantic ballads include multiple chart-toppers. Boyd Kosiyabong was born on 5 September 1967, the third of five children. Having great interest in animated cartoons and music, he started taking piano lessons by the age of four but soon had to give up formal lessons which could not satisfy his specific interest in cartoon soundtracks.