Lee Gae-byok (born September 4, 1971) is a South Korean film director and screenwriter.
After a 10-year break, he returned with the 2016 action-comedy film Luck Key, a box office hit with more than 6.9 million admissions.
Later, he worked as an assistant director in Sympathy for Mr. Vengeance (2002) and Oldboy (2003), directed by Park Chan-wook.
Showcasing his interest in movies with humor and wit, his feature debut was a romantic-comedy The Beast and the Beauty (2005).
The film is about unexpected situations that happen during a trip of Chul Soo (Cha Seung-won) and his daughter Saet Byul.