[3] She made her acting debut in 1994 in theater, since then, she has appeared in number of plays, films and television series.
She got recognition for her supporting roles in The K2 (2016), Bossam: Steal the Fate (2021), Twenty-Five Twenty-One and Shooting Stars (2022).
[3] So Hee-jung started her career in theatres and made her debut in television in 2006 and in films in 2011.
She appeared in film Sunny (2011), and TV series Angry Mom (2015), My Father Is Strange (2017), Psychopath Diary (2019), No Matter What, and Kairos (2020).
[5] In 2022, she was cast in romantic TV series Twenty-Five Twenty-One as mother of lead character.