Back Under Nineteen Spanish زیر نوزده Persian Under Nineteen ID UNDER19 Japanese 언더나인틴 Korean Under Nineteen Portuguese Under Nineteen Vietnamese Under Nineteen Chinese
| Under Nineteen | |
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| Genre | Variety |
| Written by |
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| Directed by |
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| Presented by | Kim So-hyun |
| Country of origin | South Korea |
| Original language | Korean |
| No. of seasons | 1 |
| No. of episodes | 14 |
| Production | |
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| Running time | 90 minutes 120 minutes (Finale) |
| Production companies | MBC MBK Entertainment |
| Original release | |
| Network | MBC TV |
| Release | November 3, 2018 – February 9, 2019 |
| Infobox instructions (only shown in preview) | |
Under Nineteen (Korean: 언더나인틴) was a survival show on Munhwa Broadcasting Corporation for trainees under the age of 19 years old. There were a total of 57 contestants competing to debut as a member of 1THE9. The trainees were put into groups that specializes in vocals, rapping, and performance. The show aired between November 3, 2018 and February 9, 2019.