Gong Ji-cheol, better known by his stage name Gong Yoo (Korean: 공유), is a South Korean actor. He is best known for his roles in the television dramas Coffee Prince (2007), Guardian: The Lonely and Great God (2016–2017), and Squid Game (2021–present), as well as the films Silenced (2011), The Suspect (2013), Train to Busan (2016), and The Age of Shadows (2016).

Coffee Prince is a 2007 South Korean television series starring Gong Yoo, Yoon Eun-hye, Lee Sun-kyun, and Chae Jung-an. Based on the novel of the same name written by Lee Sun-mi, it was aired on MBC's Mondays and Tuesdays at the 21:55 (KST) from July 2 and August 28, 2007 consisting of 17 episodes.