Dear X

Kim You-jungas Baek Ah-jin

Kim You-jung is a talented South Korean actress, born on September 22, 1999, in Seoul. She began her career at a remarkably young age, modeling for a confectionery brand when she was just four years old. Kim made her acting debut in 2003 and quickly rose to prominence, becoming one of the most sought-after child actresses in South Korea. Her early success earned her the affectionate title of "Nation's Little Sister," and she further captured the public's heart with her performances in popular historical dramas, earning the nickname "Sageuk Fairy." In 2016, Kim transitioned to adult roles with her leading performance in the hit series "Love in the Moonlight," which propelled her into the spotlight as a leading actress. Her impressive career continued with significant roles in various genres, including romantic comedies and historical fantasies. Notably, she gained acclaim for her performance in the 2022 Netflix film "20th Century Girl," which led to her being dubbed "Nation's First Love." Kim's accolades include ranking eighth on the Forbes Korea Power Celebrity list in 2017, making her the youngest individual to enter the Top 10 at just 17 years old. Following her successful comeback, she continues to take on diverse roles, with upcoming projects such as the Netflix comedy "Chicken Nugget" and the psychological thriller "Dear X."

Kim Young-daeas Yoon Joon-seo

Kim Young-dae is a talented South Korean actor and model, currently signed under the Agency Outer Korea. He made his acting debut in 2018 with the web drama "Office Watch 2." His career gained significant momentum when he starred in the popular MBC high school drama "Extraordinary You" in 2019, earning a nomination for Best New Actor at the MBC Drama Awards. Following his breakout role, Kim continued to build his profile with appearances in notable television series, including "The Penthouse: War In Life" and "Cheat on Me If You Can," both released in 2020. He showcased his versatility by taking on his first leading role in the tvN series "Shooting Stars" in 2022. More recently, he captivated audiences with his performance in the historical drama "The Forbidden Marriage," which aired from 2022 to 2023. Kim Young-dae's dynamic range and dedication to his craft have established him as a rising star in the South Korean entertainment industry.

Kim Do-hoonas Kim Jae-oh

Kim Do-hoon, born on September 15, 1998, is a rising South Korean actor known for his compelling performances in various television dramas. He gained significant recognition for his roles in notable series such as "Moving" (2023), "Today's Webtoon" (2023), "Your Honor" (2024), and "Dear X" (2025). As he continues to establish his career in the competitive entertainment industry, Kim's diverse acting skills and dedication have already made him a familiar face to audiences. His performances reflect a deep commitment to his craft, and he is poised to become one of the prominent talents in contemporary Korean cinema. With a strong start, Kim Do-hoon is an actor to watch as he continues to take on new and challenging roles.

Lee Yul-eumas Lim Le-na