Choi Yeon-jun (Korean: 최연준; born September 13, 1999), known as Yeonjun, is a South Korean singer-songwriter. He is a member of the South Korean boy band Tomorrow X Together, which debuted under Big Hit Entertainment in March 2019. He made his acting debut in the 2020 JTBC television series Live On. He will debut as a soloist in September 2024 with the song "Ggum".