Idol School (2017) featured a cast of 21 tracked actors. Of these, 20 (95%) are still alive today and 1 have passed away. The oldest surviving cast member is Bada, age 46. This TV series starred Bada and Stephanie Kim.
95% still with us· verified cast
Survivorship
Cast Reunion Index: 95% still living
Avg. Age at Death: 90 yrs
Deaths by Year
2025
Cast21 members
| Person | Character | Status | DOB | Age | DOD | Age in 2017 |
|---|---|---|---|---|---|---|
 Bada Self - Vocal Trainer | Self - Vocal Trainer | Living | 28/02/1980 | 46 | — | 37 |
 Stephanie Kim Self - Music Producer | Self - Music Producer | Living | 16/10/1987 | 38 | — | 30 |
 Lee Soon-jae Self - Principal | Self - Principal | Deceased | 10/10/1935 | 90 | 25/11/2025 | 82 |
 Kim Hee-chul Self - Homeroom Teacher | Self - Homeroom Teacher | Living | 10/07/1983 | 43 | — | 34 |
 Lee Hae-in Self - Contestant | Self - Contestant | Living | 04/07/1994 | 32 | — | 23 |
 Natty Self - Contestant | Self - Contestant | Living | 30/05/2002 | 24 | — | 15 |
 Jo Yu-ri Self - Contestant | Self - Contestant | Living | 22/10/2001 | 24 | — | 16 |
 Jang Gyu-ri Self - Contestant | Self - Contestant | Living | 27/12/1997 | 28 | — | 20 |
 Lee Na-gyung Self - Contestant | Self - Contestant | Living | 01/06/2000 | 26 | — | 17 |
 Lee Sae-rom Self - Contestant | Self - Contestant | Living | 07/01/1997 | 29 | — | 20 |
 Song Hayoung Self - Contestant | Self - Contestant | Living | 29/09/1997 | 28 | — | 20 |
 Park Jiwon Self - Contestant | Self - Contestant | Living | 20/05/1998 | 28 | — | 19 |
 Roh Jisun Self - Contestant | Self - Contestant | Living | 23/11/1998 | 27 | — | 19 |
 Lee Chaeyoung Self - Contestant | Self - Contestant | Living | 14/05/2000 | 26 | — | 17 |
 Baek Jiheon Self - Contestant | Self - Contestant | Living | 17/04/2003 | 23 | — | 14 |
 Lee Seo-yeon Self - Contestant | Self - Contestant | Living | 22/01/2000 | 26 | — | 17 |
 Lee Young-yoo Self - Contestant | Self - Contestant | Living | 10/07/1998 | 28 | — | 19 |
 Joo Se-Bin Self - Contestant | Self - Contestant | Living | 09/10/1997 | 28 | — | 20 |
 Lee Si-an Self - Contestant | Self - Contestant | Living | 25/02/1999 | 27 | — | 18 |
 Herin Seo Self - Contestant | Self - Contestant | Living | 26/02/2002 | 24 | — | 15 |
 Tasha Low Self - Contestant | Self - Contestant | Living | 11/10/1993 | 32 | — | 24 |