Inside Men is a 2015 South Korean political action thriller film written and directed by Woo Min-ho based on Yoon Tae-ho's webtoon The Insiders that dissects the corruption within Korean society. Starring Lee Byung-hun, Cho Seung-woo and Baek Yoon-sik, it began filming in July 2014 and was released in theaters on November 19, 2015. Inside Men and the director's cut Inside Men: The Original have sold a total of 9.1 million admissions at the box office, thus becoming the top grossing R-rated movie of all-time at the Korean Box office.

Baek Yoon-sik is a South Korean actor. He is known for his characteristic near-expressionless facial acting.