Jung Chae-yeon (Korean: 정채연; Hanja: 鄭彩娟; born December 1, 1997), better known by the mononym Chaeyeon, is a South Korean singer and actress. She is best known for being a member of the South Korean girl group DIA, and for finishing 7th in the survival show Produce 101, making her a member of I.O.I.