Choi Yeonjun is a South Korean singer, rapper, and dancer best known as a member of the boy band Tomorrow X Together (TXT), formed by Big Hit Music. He was the first member to be revealed to the public on January 10, 2019. Before his debut, he was a trainee at Big Hit Entertainment for several years and was widely recognized for his exceptional dance skills. He is often referred to by fans and media as the '4th Generation It Boy' due to his strong stage presence and fashion influence. Yeonjun has contributed to the songwriting and composition of several TXT tracks, showcasing his creative versatility. In 2021, he made his runway debut at New York Fashion Week for the brand Ul:kin. He served as a regular MC for the music program Inkigayo from 2022 to 2024, further expanding his presence in the entertainment industry. Known for his sharp rap flow and powerful performance style, he is considered the main dancer and lead rapper of the group. He spent a portion of his childhood living in the United States, which contributed to his fluency in English. Throughout his career, he has participated in various high-profile brand collaborations and fashion campaigns. Yeonjun continues to be a central figure in TXT's global success, helping the group achieve multiple chart-topping albums. His dedication to his craft and consistent growth as an artist have earned him a massive international following.