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Ryu Jun-yeol was born on September 25, 1986. He is a South Korean actor who made his debut in the 2012 film "A Werewolf Boy". He has since starred in a number of films and television series, including "Reply 1988" (2015), "Signal" (2016), and "Prison Playbook" (2017). He is considered one of the most popular actors in South Korea.