Greena Ell Park (born January 8, 1985) is a South Korean actress. Park debuted in the film The Ghost (2004). Known for her ability to act various characters, she is loved by many viewers for her outstanding roles, including the cafe waitress Hee-young in BABO (2008), the tom·boy Soon-nam in Once Upon a Time in Seoul (2008), and the female cop Lee Min-jae in the television series The Devil (2007).