Park Chae-won (Hangul: 박채원; born on November 19, 2000, in Jung District, Incheon, South Korea) known mononymously as Go Won (Hangul: 고원) is a South Korean singer. She is the eleventh revealed member of LOONA and a member of their third sub-unit, LOONA/yyxy. She is also a member of Loossemble. She debuted on January 15, 2018 as a member of LOONA and subsequently released her solo single album "Go Won" on January 30, 2018.