Secret Friend of Idols (2020) featured a cast of 17 tracked actors. Of these, 17 (100%) are still alive today. The oldest surviving cast member is Moonbyul, age 33. This TV series starred Lee Jae-yun and Moonbyul.
100% still with us· verified cast
Survivorship
Cast Reunion Index: 100% still living
Cast17 members
| Person | Character | Status | DOB | Age | DOD | Age in 2020 |
|---|---|---|---|---|---|---|
 Lee Jae-yun (Ep. 11-25) | (Ep. 11-25) | Living | 16/08/2000 | 26 | — | 20 |
| Living | 22/12/1992 | 33 | — | 28 | ||
| Living | 08/08/1997 | 29 | — | 23 | ||
| Living | 13/09/1997 | 29 | — | 23 | ||
| Living | 09/03/1999 | 27 | — | 21 | ||
| Living | 12/04/2000 | 26 | — | 20 | ||
| Living | 31/01/1998 | 28 | — | 22 | ||
| Living | 28/08/1993 | 33 | — | 27 | ||
| Living | 07/11/1998 | 27 | — | 22 | ||
| Living | 03/04/1998 | 28 | — | 22 | ||
| Living | 23/03/1999 | 27 | — | 21 | ||
| Living | 15/06/1999 | 27 | — | 21 | ||
| Living | 10/07/1999 | 27 | — | 21 | ||
| Living | 09/08/1999 | 27 | — | 21 | ||
| Living | 26/11/1999 | 26 | — | 21 | ||
| Living | 12/10/2000 | 25 | — | 20 | ||
 Kim Jun-seo Self | Self | Living | 20/11/2001 | 24 | — | 19 |
