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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).
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![STAYC TOUR [STAY TUNED] in Sydney](https://cdn.moviefone.com/image-assets/1666359/fsAVgRn8lIjFdweHpq6uODxhK8r.jpg?d=360x540&q=30)
![STAYC 1st World Tour [TEENFRESH] in Seoul](https://cdn.moviefone.com/image-assets/1446526/3QVbLW4FOW9xLg83CpDIIuoyyub.jpg?d=360x540&q=30)
