Yoo Yeon-jung (Korean: 유연정; born August 3, 1999), known mononymously as Yeonjung, is a South Korean singer signed under Starship Entertainment and Yuehua Entertainment. She is best known for being a member of the South Korean-Chinese girl group WJSN, and for finishing 11th in the survival show Produce 101, making her a member of I.O.I.
Known For: Acting
Birthday: 1999-08-03
Place of Birth: Gwangmyeong, Gyeonggi, South Korea
Also Known As: 유연정, 연정, Yoo Yeonjung, Yu Yeon-jung, 아이오아이, I.O.I, 우주소녀, WJSN, Yeonjung