Secret Relationships (2025) featured a cast of 16 tracked actors. Of these, 15 (94%) are still alive today and 1 have passed away. The oldest surviving cast member is Cha Mi-kyung, age 61. This TV series starred Kim Jun-seo and Cha Sun-hyung.
94% still with us· verified cast
Survivorship
Cast Reunion Index: 94% still living
Avg. Age at Death: 68 yrs
Deaths by Year
2025
Cast16 members
| Person | Character | Status | DOB | Age | DOD | Age in 2025 |
|---|---|---|---|---|---|---|
 Kim Jun-seo Jung Da-on | Jung Da-on | Living | 20/11/2001 | 24 | — | 24 |
 Cha Sun-hyung Ju Sung-hyun | Ju Sung-hyun | Living | 06/10/1999 | 26 | — | 26 |
 Kim Ho-young Shin Jae-min | Shin Jae-min | Living | 01/11/1997 | 28 | — | 28 |
 Cha Jung-woo Kim Soo-hyun | Kim Soo-hyun | Living | 25/10/2002 | 23 | — | 23 |
 Lee Hwi-seo Albi Construction Employee | Albi Construction Employee | Living | 04/04/1997 | 29 | — | 28 |
 Im Too-chul Albi Construction Employee | Albi Construction Employee | Living | 31/08/1990 | 36 | — | 35 |
 Jung Kyung-ho Albi Construction Employee | Albi Construction Employee | Living | 17/03/1972 | 54 | — | 53 |
 Park Eun-young Albi Construction Employee | Albi Construction Employee | Living | 18/10/1984 | 41 | — | 41 |
 Cha Mi-kyung Seong-hyeon's Grandmother | Seong-hyeon's Grandmother | Living | 25/07/1965 | 61 | — | 60 |
 Seo Jin-won Da On's father | Da On's father | Living | 07/08/1969 | 57 | — | 56 |
 An Tae-rin Seo Ji-an | Seo Ji-an | Living | 14/02/2016 | 10 | — | 9 |
 Kim Seong-tae Park Jeong-hun | Park Jeong-hun | Living | 11/09/1990 | 36 | — | 35 |
 Choi Jung-woo Su-hyeon's Father | Su-hyeon's Father | Deceased | 17/02/1957 | 68 | 27/05/2025 | 68 |
 Lee Young-eun Da-seol | Da-seol | Living | 09/08/1982 | 44 | — | 43 |
 Yoo Na-gyeol Nurse | Nurse | Living | 04/06/1996 | 30 | — | 29 |
 Su Hyun [University student #1] | [University student #1] | Living | 15/06/2000 | 26 | — | 25 |