Choi Tae-joon is a South Korean actor, model and TV host born in Seoul. He first gained recognition as a child actor in the drama "Piano", and TV movies about student youth situations. He won two Korea Drama Awards, "Best Young Actor" 2014 for the drama All About My Mother, and "Best Villain" 2017 for his villainous co-star role in the disaster-mystery drama Missing 9. Also, he won another Award for "Best Character" 2017 at the Asia Artist Awards. He has since taken on lead roles in melodrama Exit (2018) and the famous and popular romcom TV drama So I Married the Anti-fan (2021).

Missing 9 is a South Korean television series starring Baek Jin-hee and Jung Kyung-ho. It aired on MBC from January 18 to March 9, 2017 on Wednesdays and Thursdays at 22:00 (KST) for 16 episodes.