Sangwoong Jo is a South Korean musical-theatre actor who moved from professional work in Korea into the West End company of Miss Saigon. He succeeded Kwang-Ho Hong as Thuy at the Prince Edward Theatre in 2015, making his West End debut as a replacement principal. Jo later continued his career in Korean productions, including major licensed and original musicals. His casting documents a direct succession of two Korean actors in the same principal West End role and illustrates how Miss Saigon served as an important route between the Korean musical industry and London’s commercial theatre.