Lee Ju-eun (born June 7, 1995, in Suwon, South Korea), known mononymously as Jueun, is a South Korean singer and actress recognized for her role in the girl group DIA. Before debuting, she appeared on K-pop Star Seasons 2 and 3 but was eliminated in the competition stages. Initially a trainee under Polaris Entertainment, she later joined MBK Entertainment and debuted as a DIA member in 2017 with the album YOLO. Alongside her group activities, Lee showcased her versatility by participating as a back-dancer for UNB's Black Heart promotions and acting in web series such as Do Dream and I Started Following Romance. She also took part in the survival show V-1 in 2019, qualifying for the performance rounds. Following her departure from Pocketdol Studio in 2022, Lee signed with Aer Music in December of the same year. Expanding her solo career, she released her first single "Easy Breezy", featuring Seo In-guk, on April 27, 2023, and followed up with "Paradise" in October. She also contributed soundtracks for dramas, including Kokdu: Season of Deity. On June 28, 2024, she unveiled her digital single "Stay".