Lee Si-woo (이시우), born on December 19, 1999, in South Korea, is a South Korean actor also known as Lee Chan-sun. A graduate of the Department of Drama at the Korea National University of Arts, he began appearing on screen at a very young age and gradually built his career through supporting and then leading roles in dramas.
He made his first appearance in 2013 in Nine: Nine Times Time Travel, before returning to television on a more regular basis starting in 2020. That year, he played the role of pilot Jang Pil-seung in Hi Bye, Mama! and then appears in Do Do Sol Sol La La Sol. In 2021, he played Do Jun-sik in the short drama A Goal Has Been Scored, continuing its evolution toward more fully developed characters.
In 2022, he played the role of Jang Yeon-joon in the special episode Stain, integrated into KBS Drama Special. The following year marked a major milestone in his career. He landed the lead role of Yoon Min-jae in Pale Moon, and then appears in See You in My 19th Life portrayed by Ha Do-jin. He really stands out in Boyhood, in which he plays Jung Gyeong-tae, the central character in this series set in a high school.
In 2024, Lee Si-woo continues his rise with Perfect Family, in which he plays Ji Hyun-woo. He then went on to play one of the main characters in the romantic comedy Love Your Enemy, in which he plays Gong Moon-soo. He also appears in the special drama Mi Ran, the Junk Dealer as Park Jin-gu. For Love Your Enemy, he also contributed to the soundtrack with the song «Take Off,» performed with SAya.
In 2025, he landed another leading role in Love Me, playing Seo Jun-seo. Her growing presence in romantic and contemporary dramas is further confirmed by Love Cloud, scheduled for release in 2027, in which he is set to play Lee Yong in one of the leading roles.
