Siyoon
Biography
Kim Si-yoon is a South Korean singer and rapper managed by MYSTIC Story. She was officially revealed as a trainee under MYSTIC Rookies on February 18, 2020. Now, she is a member of the girl group Billlie.
Known For & Full Filmography4 Titles
Drama Series - 2025, 16 episodes • as Self
Global music icons team up with world-renowned K-pop idols for spectacular song battles. Performing their biggest hits with a K-pop twist, these artists show up, show out, and shut it down in a friendly competition for the ultimate bragging rights.
Movie - 2024, 2h 15m • Main Cast Role
With only four spots available in a new K-pop supergroup and the final cut a week away, the competition is off the charts. When a talented and mysterious new girl is introduced at the last minute, things start to get strange — girls are being hunted and attacked one by one, but who is responsible for the carnage, and more importantly... who will make the final cut?
Drama Series - 2022, 16 episodes • as Self
Basic Physical Fitness Improvement Project.
Movie - 2022, 2h 15m • Main Cast Role
For their first year anniversary Billlie is showcasing a concert to deliver the story of their unique universe, by using XR(Extended Reality) to tear down the border of different dimensions, time, and space.