Luck Key is a 2016 South Korean action comedy film directed by Lee Gae-byok, starring Yoo Hae-jin in the lead role. It is a remake of the 2012 Japanese comedy film Key of Life.

Yoo Hae-jin is a South Korean actor. After graduating with a Theater degree from Seoul Institute of the Arts, he became a member of Theater troupe The Mokwha Repertoire Company. He has established himself as one of the top actors in the country, playing both supporting and lead roles.