Biography
Moon Seong-hyun is a South Korean actor born on June 2, 2006. He is known for playing the younger versions of male leads in several popular K-dramas, beginning his career in 2021. He is managed by FNC Entertainment. He first appeared in the 2021 dramas Vincenzo and Hometown Cha-Cha-Cha. He gained significant recognition for his role as the young Seo Yul in the fantasy drama Alchemy of Souls and as Prince Simso in the historical series Under the Queen's Umbrella. His emotional performance in the latter received high praise. In 2024, Moon took on his first starring role in the web drama The Chairman of Class 9.he was nominated for "Best Young Actor" at the 60th Baeksang Arts Awards and won "Best Young Actor" at KBS Drama Awards with Beauty and Mr. Romantic.
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Our Sticky Love
Kim Pil-seung
2026 • 12 episodes
Alchemy of Souls
Seo Yul (teen)
2022 • 30 episodes
Vincenzo
Jang Han Seok [Teen]
2021 • 1 episode
Queen of Tears
Baek Hyun-woo (teen)
2024 • 1 episode
Hometown Cha-Cha-Cha
Hong Doo-shik (teenager)
2021 • 2 episodes
Under the Queen's Umbrella
Prince Shimso
2022 • 16 episodes
Trigger
Teenage Moon Baek
2025 • 10 episodes
Sh**ting Stars
Gong Tae-seong (teen)
2022 • 1 episode
Reborn Rich
Jin Seong-jun (young)
2022 • 2 episodes
Beauty and Mr. Romantic
Ko Pil-seung (teen)
2024 • 50 episodes
The King of Pigs
Kang-min (teen)
2022 • 12 episodes
Hello, Me!
Chae Seong-U / Chae Chi-Su
2021 • 16 episodes
The One and Only
Min Woo-Cheon (teen)
2021 • 16 episodes
Dr. Cheon and the Lost Talisman
Young Dr. Cheon
2023
The Chairman is Level 9
Na Yi-soo
2024 • 12 episodes
Stock Struck
Lim Ye Joon (teen)
2022 • 1 episode
Still Shining
2026
Fragment
2024