Lee Si-eon

Lee Si-eon (이시언), born Lee Bo-yeon, built his career the hard way: years of supporting roles, then one breakout, then a long stretch of proving he was much more than comic relief. After studying at the Seoul Institute of the Arts and debuting in 2009, he became a familiar television presence before the industry fully caught up to how useful he was inside an ensemble.

Reply 1997 gave him the breakthrough face-recognition moment, but the staying power came from range. He sharpened his timing in broad crowd-pleasers, then slipped into darker and more grounded dramas like Prison Playbook and My Mister. Variety television widened the audience again, especially through I Live Alone, where his dry delivery and unfiltered rhythm translated just as well off-script as they did in drama.

That mix still defines his value in 2026. Lee can anchor side plots, elevate a cast dynamic, and make a supporting role stick after the episode ends. His return in Bloodhounds Season 2 on Netflix keeps him in the premium-streaming lane while preserving the everyman presence that made him a fixture in Korean entertainment.