Park Geun-hye
During the administration of President Park Chung-hee, his daughter, Park Geun-hye, assumed the duties of First Lady after her mother, Yuk Young-soo, was shot dead. Park Geun-hye later became President herself (the first, and to date only, female President of South Korea), but was never married while in office, so there has yet to be a first gentleman of Korea.