Lee Sun-mi (born Sun Mi on May 2, 1992), known mononymously as Sunmi, is a South Korean singer and songwriter. She debuted in 2007 as a member of South Korean girl group Wonder Girls and left the group in 2010 to pursue an academic career. After a three-year hiatus, Sunmi resumed her career as a soloist with her 2013. In 2015, Sunmi was announced to be resuming promotion with the Wonder Girls until their disbandment in 2017. She subsequently left JYP Entertainment.