Lee Da-hee kicked off her acting career after placing as a finalist in the 2002 SBS Super Elite Model Contest. Her breakthrough came in 2013 when she played one of the main characters in the hit SBS series I Hear Your Voice. Her work in the drama won her the New Star Award at the SBS Drama Awards. That same year, she starred in the KBS2 thriller melodrama Secret, in which she was named Best Supporting Actress at the KBS Drama Awards. In 2015, she took home a Special Acting Award at the SBS Drama Awards for her work in the police procedural series Mrs. Cop. In 2018, she portrayed Lee Min-ki’s stepsister in JTBC’s Beauty Inside, which was based on the 2015 film of the same name. Her work in the series scored her a Best Supporting Actress for TV nomination at the 55th Baeksang Arts Awards. In 2019, she acted alongside Im Soo-jung and Jeon Hye-jin in the tvN drama Search Query: WWW.
Lee Da-hee attended Yongin High School and Sejong University. She has a younger brother.