
South Korea
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.

as Baek Hyun-woo (teen)

as Seo Yul (teen)
2022

as Jang Han Seok [Teen]
2021

as Baek Hyun-woo (teen)
2024

as Teenage Moon Baek
2025

as Hong Doo-shik (teenager)
2021

as Jin Seong-jun (young)
2022

as Gong Tae-seong (teen)
2022

as Prince Shimso
2022

as Kang-min (teen)
2022

as Ko Pil-seung (teen)
2024

as Young Dr. Cheon
2023

as Chae Seong-U / Chae Chi-Su
2021
2024
as Baek Hyun-woo (teen)
1 ep.

as Seo Yul (teen)
30 episodes

as Jang Han Seok [Teen]
1 episodes

as Baek Hyun-woo (teen)
1 episodes

as Teenage Moon Baek
10 episodes

as Hong Doo-shik (teenager)
2 episodes

as Jin Seong-jun (young)
2 episodes

as Gong Tae-seong (teen)
1 episodes

as Prince Shimso
16 episodes

as Kang-min (teen)
12 episodes

as Ko Pil-seung (teen)
50 episodes

as Chae Seong-U / Chae Chi-Su
16 episodes

as Min Woo-Cheon (teen)
16 episodes

as Lim Ye Joon (teen)
1 episodes

as Na Yi-soo
12 episodes