Sooha Kim is a South Korean musical-theatre actor whose international career began with Miss Saigon. She joined the West End production at the Prince Edward Theatre in 2015 as an ensemble member and first cover for Kim, later playing Kim as a principal in the United Kingdom and international tour. Kim subsequently returned to Korea and established herself in leading roles including Aida, Hadestown, and The Great Comet. Her career shows how ensemble and cover work in the West End can lead to principal international casting and then contribute to a major career in the Korean musical industry.