While most actors and singers started off their careers through auditions, there are also celebrities that are street-cast by agencies or introduced to agencies by their friends.
A good number of these celebrities actually started out their career as models for online shopping malls, which are very popular in Korea.
The gugudan member is currently working on School 2017, in which she plays the lead role. School 2017 will begin airing on July 17 at 10 p.m. KST. Plus, Kim Sejeong recently talked about why it was so satisfying to film at the school she used to attend for School 2017.