If you’ve been tuning into SBS’s new drama 'Agent Kim Reactivated,' you've probably seen the rookie actress playing So Jisub's daughter. Her name is Seo Sumin, and her popularity is currently skyrocketing after just two episodes.
The drama, which is based on the hit webtoon of the same name, is already breaking records. It tells the story of 'the world's most ordinary father' who suddenly turns into 'the world's most dangerous man' to rescue his one and only daughter. Featuring star-studded cast like So Jisub, Choi Daehoon, and Yoon Kyunghoo, the drama reached viewer ratings of 15.7% (peaking at 18.1%), officially making it SBS' highest-rated drama of the year so far.
What a lot of people don't know is that even though 'Agent Kim Reactivated' marks her official drama debut, Seo Sumin was already a viral sensation on social media way before that.
Being the Gen Z she is, Seo Sumin initially launched her own personal Youtube channel to introduce herself to the public. Last year, she posted a quick 44-second clip titled 'Taking off my glasses and getting comfortable with the camera,' which has reached a whopping 3.16 million views as of the 29th.
She also caught everyone's attention back in August 2023, when she appeared on the channel of popular beauty creator 'Haemin Sunsaeng.' The video she featured on easily reached 2 million views, and when she went back to the channel in May 2025, she spilled:
"I received love calls from major agencies that everyone would recognize. I'm now signed with an agency and have been training an actress."
