Shim Ja-yun (심자윤), known under her stage name Yoon (윤), is a South Korean singer/K-pop idol. She is under High Up Entertainment. She is best known as one of the lead vocalists of the girl group STAYC.
Known For:Acting
Birthday:2004-04-14
Place of Birth:Gwangju, South Korea
Also Known As:심자윤, 윤, Shim Ja-yoon, Shim Ja-yun, Shim Jayoon, Sim Ja-yun
