Celebrities become an Unnie (older sister) for a day to a younger celebrity spending 24 hours together, sharing one bed and one blanket.
| Title | Secret Sister |
|---|---|
| Year | 2018 |
| Genre | Reality |
| Country | South Korea |
| Studio | JTBC4 |
| Cast | |
| Crew | 오정 (Writer), 박소정 (Creator), 박소정 (Director) |
| Alternative Titles | Secret Unnie |
| Keyword | |
| First Air Date | May 04, 2018 |
| Last Air date | Sep 07, 2018 |
| Season | 1 Season |
| Episode | 19 Episode |
| Runtime | 50:14 minutes |
| Quality | HD |
| IMDb: | 0.00/ 10 by 0.00 users |
| Popularity | 8.604 |
| Language | Korean |
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