Previously, Kim Soo Hyun, was known as an idol trainee under Mystic Entertainment, participating in survival shows like 'Produce 101' season 1 and 'MIXNINE'. She then made her acting debut through KBS's 'Lingerie Girls' Generation' in 2017, before landing her role in 'A-Teen'. 

Mystic said, "We plan on supporting Kim Soo Hyun to the fullest so that she can grow as a multi-talented entertainer, as she has shown potential in both acting and singing. We ask for your abundant anticipation for her future activities." Best of luck to Kim Soo Hyun!