Seo Bok is a 2021 South Korean sci-fi action film directed by Lee Yong-ju and starring Gong Yoo and Park Bo-gum. The film revolves around a former intelligence agent Gi-heon, who gets involved with the first human clone, Seo Bok. Principal photography began in May 2019. The film with a production cost of ₩16.5 billion was anticipated to release in December 2020 but its release was postponed due to the resurgence of the COVID-19 pandemic. Finally the film was released simultaneously in theatres and via streaming media TVING on April 15, 2021. In Vietnam, this film premiered exclusively on iQiyi on April 22, 2021.

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).