Undercover High School (2025) featured a cast of 12 tracked actors. Of these, 12 (100%) are still alive today. The oldest surviving cast member is Kim Young-ah, age 51. This TV series starred Seo Kang-joon and Jin Ki-joo.
100% still with us· verified cast
Survivorship
Cast Reunion Index: 100% still living
Cast12 members
| Person | Character | Status | DOB | Age | DOD | Age in 2025 |
|---|---|---|---|---|---|---|
 Seo Kang-joon Jeong Hae-sung | Jeong Hae-sung | Living | 12/10/1993 | 32 | — | 32 |
 Jin Ki-joo Oh Su-ah | Oh Su-ah | Living | 26/01/1989 | 37 | — | 36 |
 Kim Shin-rock Seo Myung-ju | Seo Myung-ju | Living | 24/03/1981 | 45 | — | 44 |
 Kim Min-ju Lee Ye-na | Lee Ye-na | Living | 05/02/2001 | 25 | — | 24 |
 Yoon Ga-i Park Mi-jung | Park Mi-jung | Living | 16/09/2000 | 26 | — | 25 |
 Kim Young-ah Im Chung-ha | Im Chung-ha | Living | 24/05/1975 | 51 | — | 50 |
 Lee Hyun So Han Seung-jae | Han Seung-jae | Living | 08/03/1999 | 27 | — | 26 |
 Yun Chae-bin Yun Chae-rin | Yun Chae-rin | Living | 26/05/2001 | 25 | — | 24 |
 Kim Sun-min Ji Hyeon-jun | Ji Hyeon-jun | Living | 30/03/2000 | 26 | — | 25 |
 Kim Seung-beom Kim Ho-jin | Kim Ho-jin | Living | 21/01/2002 | 24 | — | 23 |
 Kang Pil-jun Son Beom-Sik | Son Beom-Sik | Living | 29/03/1996 | 30 | — | 29 |
 Su Hyun [Student] | [Student] | Living | 15/06/2000 | 26 | — | 25 |