Kim Chi-hun (Korean: 김치훈; born April 11, 1981), known professionally as Teo Yoo (Korean: 유태오), is a South Korean actor. He has starred as Viktor Tsoi in the biographical musical film Leto (2018) and won the Blue Dragon Film Award for Best New Actor in 2021. In 2023, he gained wider recognition for starring in the romantic drama film Past Lives, earning a nomination for the BAFTA Award for Best Actor in a Leading Role. In June 2024, he was invited to join the Academy of Motion Picture Arts and Sciences.