Seo Dong-hyeon (Hangul: 서동현; born May 3, 1991), better known by his stage name Samuel Seo (서사무엘; Seo Samuel), is a South Korean singer-songwriter, rapper, and record producer. Born in Seoul, he spent his youth living in his home country, as well as Japan, the United States, and Canada. An aspiring pianist, Seo's exposure to hip hop music in his teens led him to pursue the genre. He released a series of singles before enlisting and serving two years in military service.