Samuel Seo (Korean: 서사무엘; born May 3, 1991) 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.