Yoon Hyun-suk (; born September 8, 2001), known mononymously as Hyunsuk, is a South Korean actor, singer, and rapper. He is a former member of the boy group CIX debuted in 2019. He is best known for his lead roles in Best Mistake 3 (2021), Fall for You (2022), and The Chairman Is Level 9 (2024).
Career On March 13, 2019, C9 Entertainment revealed Hyunsuk as the third member of its upcoming boy group, tentatively named C9Boyz, by releasing his first profile image. The group debuted as CIX on July 23, 2019. In 2021, Yoon made his acting debut in season 3 of the web series Best Mistake. On April 29, 2026, C9 announced CIX's disbandment and the end of his contract on May 31. In June 2026, he signed an exclusive contract with Management Run and began focusing on acting.
Filmography Television series
Year Title Role Notes 2022 Fall for You Jin Woo 2024 The Chairman Is Level 9 Boo Ro-won 2026 My Bias, My Boss Hyeok Ji Young-hyun Season 2
Web series Year Title Role Notes 2021 Best Mistake Kim Dae-young Acting debut (season 3) 2025 Me, Myself, and I Nam Do-yoon Short-form The Prime Minister's Youngest Young Master's First Love Lee Kwon 2026 My Little Chef Do Yoon
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