Born in Seoul, South Korea on August 1, 2001 (age 25)
Park Si-eun, known mononymously as Sieun, is a South Korean singer and actress under High Up Entertainment. She is a member of the girl group STAYC and a former member of the trainee team i-Teen.
She made her acting debut in the children's television series Pluto Squad (2014).
![STAYC 1st World Tour [TEENFRESH] in Seoul](https://image.tmdb.org/t/p/w342/3QVbLW4FOW9xLg83CpDIIuoyyub.jpg)
![STAYC TOUR [STAY TUNED] in Sydney](https://image.tmdb.org/t/p/w342/fsAVgRn8lIjFdweHpq6uODxhK8r.jpg)