Kevin Woo is a Korean-American singer, actor, and songwriter born and raised in California. He moved to South Korea as a teenager to train professionally, first performing with XING and then becoming a principal vocalist of U-KISS, with whom he worked in Korea and Japan from 2008 to 2017. Woo subsequently pursued an international solo career and appeared in the Korean production of Altar Boyz. He made his Broadway debut in 2022 as Jun Hyuk, the leader of the fictional boy group F8, in the original cast of KPOP. In 2025, he reached another global audience as the singing voice of Mystery Saja in the animated musical film KPop Demon Hunters. His career directly links the Korean idol system, Broadway musical theatre, and Korean-themed international screen entertainment.