Seo Hye-won made her acting debut in 2018 with the Naver web series Just One Bite. That same year, she played a supporting character in SBS’s My Strange Hero. In 2019, she reprised her role in Just One Bite Season 2 and also appeared in the MBC series Welcome 2 Life. In 2020, she joined OCN’s crime-action drama Team Bulldog: Off-duty Investigation and tvN’s coming-of-age series True Beauty. In 2021, she became part of the JTBC romance drama Nevertheless and the SBS musical series Let Me Be Your Knight. In 2022, she received love from viewers for her scene-stealing performance in the SBS romantic comedy Business Proposal. She then landed roles in the KBS2 sageuk Red Heart and in the tvN fantasy romance Alchemy of Souls.

Seo Hye-won attended Yong In University.