Yoo Ha (Hangul: 유하; or spelled Yu Ha; born February 9, 1963) is a South Korean film director, screenwriter and a contemporary poet. He directed the critically acclaimed films Marriage Is a Crazy Thing (2002), Once Upon a Time in High School (2004), and A Dirty Carnival (2006). The latter is a gangster movie with allusions to Martin Scorsese films like Gangs of New York, Mean Streets and Goodfellas.