Lee Seok-min (이석민; born February 18, 1997), known professionally as DK or Dokyeom (도겸), is a South Korean singer, songwriter and actor under Pledis Entertainment. He is a member of the boy group SEVENTEEN and its Vocal Team sub-unit. He is also the leader of the special sub-unit BSS. In 2019 and 2021, DK portrayed the role of King Arthur in the South Korean productions of XCalibur.