Name: Yoo Yeon-seok (유연석) DOB: April 11, 1984 Dramas: Reply 1994, Gu Family Book Movies: Oldboy, Werewolf Boy, Hwayi His real name is Ahn Yeon-Seok..."Yoo" is part of his stage name! He got his first role in Oldboy because a friend of his remembered that he resembled another actor in the film. Without even going to the audition he was cast as the younger counterpart to that same actor! After finishing university, he resumed his acting career and is now signed up for multiple high-profile films this year! Find him in Hyorin's "One Way" music video!