Seo Hyun-jin debuted in 2001 as a singer, being part of K-pop girl group M.I.L.K under BM Entertainment — an affiliate of SM Entertainment — with the album “With Freshness.” She turned to acting in 2005 through the musical “The Sound of Music.” She featured in small and big roles across the small screen, but her turning point as an actor came in 2015 through tvN drama series “Let’s Eat 2,” and the following year in “Another Miss Oh.” She has also starred in popular series such as “Black Dog: Being A Teacher,” (2019-20) on tvN, “Dr. Romantic,” (2020) on SBS, and “The Beauty Inside,” (2018) on JTBC.