Um Ki-joon is a South Korean actor. He is best known for his roles in television series I'm Not a Robot (2017–2018), The Penthouse: War in Life (2020–2021) and Little Women (2022).

I'm Not a Robot is a South Korean television series starring Yoo Seung-ho, Chae Soo-bin, and Um Ki-joon. It is written by Kim Sun-mi and directed by Jung Dae-yoon. Producing the series for MBC is May Queen Pictures. It aired on MBC TV from December 6, 2017 to January 25, 2018, every Wednesday and Thursday at 21:55 (KST).