Lee You-mi emerged as one of South Korea's most captivating and versatile actresses, gaining international recognition for her deeply affecting performance in the hit Netflix series Squid Game. Born on July 18, 1994, in Seoul, South Korea, she developed a passion for acting at a young age and pursued her dreams by studying at the Korea National University of Arts, where she honed her craft in theater and film. Her early career saw her take on minor roles in independent films and television dramas, gradually building a reputation for her ability to portray complex, emotionally charged characters with remarkable subtlety.

Lee You-mi made her acting debut in 2010 with a small role in the film The Yellow Sea, but it was her work in the 2017 independent film The Whispering that first brought her critical acclaim, earning her a Best Actress award at the Korean Film Festival. She continued to build her filmography with notable performances in movies such as Young Adult Matters and The Silent Sea, the latter of which showcased her range in a science fiction thriller opposite Bae Doona. Her breakthrough, however, came in 2021 when she was cast as Ji-yeong, a troubled young woman participating in the deadly games of Squid Game. Her portrayal of a character burdened by guilt and seeking redemption resonated deeply with audiences worldwide, and her poignant scenes with HoYeon Jung became some of the most talked-about moments of the series. This role earned her a Primetime Emmy Award nomination for Outstanding Guest Actress in a Drama Series, making her one of the few Korean actors to receive such recognition.

Following the global success of Squid Game, Lee You-mi's career accelerated rapidly. She starred in the critically acclaimed Korean drama The Glory, where she played a complex, morally ambiguous character that further demonstrated her dramatic depth, and she took on a leading role in the mystery thriller series The Guest. Her ability to seamlessly transition between indie films and mainstream projects has made her a sought-after talent in the Korean entertainment industry. In 2023, she appeared in the film Kill Boksoon, a high-octane action drama that allowed her to showcase a more physically demanding side of her acting. Critics have consistently praised her for her intense, nuanced performances, often highlighting her skill at conveying inner turmoil with just a glance.

Currently, Lee You-mi continues to be an active and influential figure in both film and television. She has been cast in several highly anticipated upcoming projects, including the drama series The Last of Us: Season 2, marking her entry into a major international production. She remains dedicated to selecting roles that challenge societal norms and explore the darker facets of human nature, a choice that has endeared her to a growing global fanbase. Off-screen, she is known for her reserved and thoughtful personality, often using her platform to advocate for mental health awareness and support independent filmmakers. As her career continues to evolve, Lee You-mi stands as a testament to the power of subtle, character-driven storytelling, solidifying her place as one of the most respected and compelling actors of her generation.