Sieun has been in the spotlight ever since she was little — thanks to her father, singer Park Nam-jung, who was popular in the late 1980s for his “L-dance.” Sieun, along with her father, appeared on numerous variety shows, starting with SBS’s “Star Junior Show Bungeoppang” (translated, 2009) and JTBC’s “Children, Life’s Greatest Blessing” (2013-16). She later launched her acting career as the lead in EBS’s drama series “Pluto Secret Society” (2014). Since then, she played minor roles as the child version of characters in shows like SBS’s “Six Flying Dragons” (2015), JTBC’s “Rain or Shine” (2017) and “Mystic Pop-up Bar” (2020). In November 2020, Sieun debuted as a member of girl group STAYC.