Lee Min-ho, a South Korean actor and singer, starred in his first leading role in film with "Gangnam Blues",  a 2015 South Korean noir action film written and directed by who?
Lee Min-ho (actor, born 1987):  Lee starred in his first leading role in film with "Gangnam Blues" (2015), followed by his first China-produced film "Bounty Hunters" (2016).
i don't know