Park Seo-ham

Park Seo-ham has worked under three names, and the third one is the one on the poster. He was born Park Gyeong-bok, debuted in the boy band KNK as Park Seung-jun, and switched to Park Seo-ham in 2018. Four years later that name sat next to Park Jae-chan’s on Semantic Error, the Watcha series that took Korean BL into the mainstream at home.

He was born on 28 October 1993 in Siheung, Gyeonggi Province. Before KNK he trained at Big Hit Entertainment, and in February 2013 he placed second at JYP Entertainment’s 10th Open Audition, which made him an actor trainee there. He also danced as a backup performer for Bestie’s “Zzang Christmas” and “I Need You” stages. KNK debuted as a five member group on 3 March 2016, and in September 2021 he left both the group and 220 Entertainment to concentrate on acting.

The acting credits had started early and small. He was young Anthony in Children of the 20th Century (2017), Yoon Soo in Dating Class (2019), Joo Woo-kyung in the second season of Just One Bite (2019) and Eden in One Fine Week 2 (2020). In January 2022 he was confirmed as Jang Jae-young, the design student of Semantic Error, opposite Park Jae-chan as Choo Sang-woo. The eight episodes premiered on 16 February 2022, and a theatrical cut, Semantic Error: The Movie, followed the same year. In March 2022 he signed an exclusive contract with Npio Entertainment.

The later list moves into period drama and romantic comedy. He played Jung Cheon in The Murky Stream (2025), and in 2026 he joined tvN’s Our Universe as Park Yoon-seong, opposite Bae In-hyuk and Roh Jeong-eui, and made a special appearance as Song Min-kyu in See You at Work Tomorrow! The singing never fully stopped either: in 2025 he recorded “My Valentine” with Lee Si-woo for the Show Musical Dream High soundtrack.