K-pop birthdays
K-Pop Idol Birthdays on September 21
K-pop idols who share a September 21 birthday, with member and group profile links.
September 21 birthdays
12 idols with birthdays on September 21.
| Rank | Member | Birthday | Turns | Group |
|---|---|---|---|---|
| #1 |  ChenMain Vocalist | September 21, 1992 | Turns 34 | Exo |
| #2 |  TsukiVocalist, Dancer | September 21, 2002 | Turns 24 | Billlie |
| #3 |  Jason DeruloSinger/Songwriter | September 21, 1989 | Turns 37 | Friends of Kpop |
| #4 |  TaeriMember | September 21, 2002 | Turns 24 | iii |
| #5 |  ChenMain Vocalist, Maknae | September 21, 1992 | Turns 34 | CBX |
| #6 |  HyoyeonVocalist, Rapper | September 21, 1989 | Turns 37 | Girls On Top |
| #7 |  IdoMaknae, Sub Vocalist, Visual | September 21, 2006 | Turns 20 | iONE! |
| #8 |  MariaMain Vocalist | September 21, 2000 | Turns 26 | UHSN |
| #9 |  MasatoMember | September 21, 2003 | Turns 23 | VAY ONN |
| #10 |  Nagai ManamiMember | September 21, 2002 | Turns 24 | Girls Planet 999 |
| #11 |  Um JioneMaknae | September 21, 2009 | Turns 17 | Keyveatz |
| #12 |  Um JiwonMember | September 21, 2009 | Turns 17 | I-LAND 2 |