Hong Seok-jae (born 1983) is a South Korean film director and screenwriter. Hong wrote and directed his thriller feature debut Socialphobia (2015), which won the NETPAC Award and DGK Award for Best Director at the 19th Busan International Film Festival in 2014, and the Best New Director and Best New Actor (for Byun Yo-han) at the 24th Buil Film Awards in 2015. His short film Keep Quiet (2011) won the Special Jury Prize and I love Shorts! Audience Award at the Mise-en-scène Short Film Festival in 2012.