Kim Sung-joo (born February 16, 1994) is a South Korean singer and actor. Kim debuted as a member of South Korean-Chinese band UNIQ in 2014. Kim made his television debut in the romantic Chinese drama Magical Space-time (2016) and his film debut in MBA Partners (2016). He is best known for his supporting roles in Live Up to Your Name (2017) and My Secret Terrius (2018).
Kim was a former YG Entertainment trainee, but left to join the Chinese company, Yuehua Entertainment.
Kim debuted in 2014 with the South Korean-Chinese boy band group Uniq with the song “Falling in Love”.
Kim promoted with Uniq for a few years, where he landed his first acting role in 2016, together with his band mates in the Chinese film, MBA Partners, where Kim and Wang Yibo playing the lead roles, while Zhou Yixuan, Li Wenhan and Cho Seung-youn making cameos.
Kim then starred in the Chinese drama, Magical Space-time before his second film in Kill Me Please.
Kim was cast in The Liar and His Lover where he played “Yoo Si-hyun”, the leader and vocalist of the popular band “Crude Play” in the series. He also starred in the tvN’s drama Live Up to Your Name.
In September 2018, it was reported that Kim would be joining MBC’s drama, My Secret Terrius, where he will play Ro Da-woo, a genius hacker who is rebellious.