"One Dream!, Hello Im Yeonjun!" Choi Yeonjun (연준) made headlines when he was unveiled as the first member of Big Hit Entertainment's newest boy group, TXT (Tomorrow X Together). Yeonjun trained for four years and was said to be a former trainee under Cube Entertainment. And while training, he performed as a back-up dancer on several stages.
On March 4, 2019, he made his official debut with the group through first mini album ‘The Dream Chapter: STAR’.