Kim Yoon-hye started out as a model before landing her first acting role in director Jang Jin’s film My Son in 2007. She then bagged appearances in several TV series such as KBS2’s My Mom, Supermom in 2010 and MBC’s You’ve Fallen for Me in 2011. In 2012, she became part of the comedy horror movie Ghost Sweepers. In 2013, she starred in the film Steel Cold Winter, which won her Best New Actress at the 34th Golden Cinema Festival. In 2017, she joined the main cast of the SBS rom-com sageuk My Sassy Girl, which was based on the hit 2001 movie of the same name. This was followed by supporting roles in the JTBC dramas The Third Charm and Eighteen Again, which aired in 2018 and 2020, respectively. In 2021, she acted alongside Song Joong-ki and Jeon Yeo-bin in the hit tvN series Vincenzo.

Kim Yoon-hye previously used the stage name Woori, which means “us” in Korean.