When I Sleep (2025) featured a cast of 11 tracked actors. Of these, 10 (91%) are still alive today and 1 have passed away. The oldest surviving cast member is Seo Sang-won, age 58. This film starred Jeong Ji-in and Oh Woo-ri.
91% still with us· verified cast
Survivorship
Cast Reunion Index: 91% still living
Avg. Age at Death: 30 yrs
Deaths by Year
2024
Cast11 members
| Person | Character | Status | DOB | Age | DOD | Age in 2025 |
|---|---|---|---|---|---|---|
 Jeong Ji-in Sun-ah | Sun-ah | Living | 21/02/1989 | 37 | — | 36 |
 Oh Woo-ri Ji-soo | Ji-soo | Living | 06/08/1996 | 30 | — | 29 |
 Park Bo-ram Bo-mi | Bo-mi | Deceased | 01/03/1994 | 30 | 11/04/2024 | 31 |
 Lee Han-ju Byeong-jae | Byeong-jae | Living | 02/04/1987 | 39 | — | 38 |
 Kim Young-pil Dae-ho | Dae-ho | Living | 03/09/1973 | 53 | — | 52 |
 Kim Ju-hun Hae-soo | Hae-soo | Living | 01/03/1980 | 46 | — | 45 |
 Lee Sang-hee Su-jin | Su-jin | Living | 08/10/1983 | 42 | — | 42 |
 Han Ji-won Su-yeon | Su-yeon | Living | 29/08/1996 | 30 | — | 29 |
 Baek Hyun-joo Jung-hee | Jung-hee | Living | 22/05/1970 | 56 | — | 55 |
 Seo Sang-won Sun-ah's father | Sun-ah's father | Living | 11/11/1967 | 58 | — | 58 |
 Yang Mal-bok Bo-mi's mother | Bo-mi's mother | Living | 03/09/1972 | 54 | — | 53 |