Seo Yea-ji is a South Korean actress. She began her acting career in the sitcom Potato Star 2013QR3 (2013–2014). This was followed by major roles in period drama Diary of a Night Watchman (2014), thriller Last (2015), and fantasy Moorim School: Saga of the Brave (2016). Her notable lead roles in television series include Save Me (2017) and Lawless Lawyer (2018). She rose to prominence with the romantic comedy It's Okay to Not Be Okay (2020).

Lawless Lawyer is a 2018 South Korean television series ran starring Lee Joon-gi, Seo Yea-ji, Lee Hye-young, and Choi Min-soo. The series was written by Yoon Hyun-ho and directed by Kim Jin-min. The series is set in the fictional city of Kisung which is described as lawless and corrupt.