Kim Do-hwan made his acting debut in 2017 through the web dramas Seventeen and Yellow. In 2018, he played supporting roles in MBC’s The Great Seducer and Channel A’s Twelve Nights. In 2019, he portrayed a Math genius in the JTBC coming-of-age drama A Moment at Eighteen. His career breakthrough came in 2020 when he was cast in the hit tvN series Start-Up. In 2021, he starred in the tvN fantasy romantic comedy My Roommate Is a Gumiho.
Kim Do-wan graduated from Kaywon High School of Arts and continued his studies at Sejong University.