Song Geon-hee (송건희), born on August 16, 1997, in Gunpo, Gyeonggi Province, is a South Korean actor. A graduate of Sejong University’s film program, he made his acting debut in 2017 in the web series Flat, in which he plays one of the leading roles.
After a few appearances in My ID Is Gangnam Beauty, he gained more recognition in 2018 thanks to SKY Castle, in which he plays Park Yeong-jae. He then went on to play supporting roles and make guest appearances in several popular TV series, including The Fiery Priest, Moment at Eighteen, Love Alarm, Arthdal Chronicles and The Tale of Nokdu in 2019.
In 2020, he played Crown Prince Yi Heon in Mystic Pop-Up Bar, and then landed a leading role—that of Thomas Cha—in Missing: The Other Side. He then appears in Snowdrop as Eun Yeong-u, the heroine's brother. In 2022, he reprised his role as Thomas Cha in the second season of Missing: The Other Side and plays Yeo-reum, the main character in’Alice, the Final Weapon. That same year, he appeared in a movie titled A Christmas Carol and appears in the musical Midnight Sun.
Its popularity surged in 2024 with Lovely Runner, in which he plays Kim Tae-seong. This performance earned him, among other honors, a nomination for Best New TV Actor at the 2025 Baeksang Arts Awards and the Rising Star Award at the 2024 Brand of the Year Awards.
He went on to make appearances in Family by Choice (2024) and Karma (2025), and then plays two characters, Lee Gi-beom and Cha Yeong-beom, in The Scarecrow (2026), a performance that earned him a nomination at the Blue Dragon Series Awards.
Song Geon-hee began his military service as an active-duty soldier on December 1, 2025.
