Jihae Kim (born 1988 or 1989),[1] better known by the mononym Jihae, is a South Korean singer and actress based in the United States. She de…Jihae Kim (born 1988 or 1989),[1] better known by the mononym Jihae, is a South Korean singer and actress based in the United States. She debuted as a singer in 2007 and has since released four full-length albums. As an actress, she has appeared in the miniseries Mars (2016) and the film Mortal Engines (2018).