Seo Ye-ji (born April 6, 1990) 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) and thriller Last (2015). Seo played lead roles in fantasy teen series Moorim School: Saga of the Brave (2016), psychological thriller Save Me (2017) and legal thriller Lawless Lawyer (2018). Her lead role alongside Kim Soo-hyun in It's Okay To Not Be Okay (2020) catapulted her to national and global stardom.