South Korean actor Kim Seon-ho () began his career in the Daehak-ro theater district of Seoul, making his professional debut in the 2009 production of New Boeing Boeing. Kim performed exclusively in theater for eight years, during which time his rising prominence earned him the nickname "theater idol." In a 2016 year-end review, critic Huh Yun-seon highlighted Kim's "explosive energy" on stage and recognized him as an actor with significant potential.
Following his 2017 television debut, Kim has continued to return to the stage every one to two years. To date, his body of work includes over 20 live theater productions, two talk show appearances, and a joint concert.