Member ages
AtHeart Member Ages and Birthdays
AtHeart member ages and birthdays ranked oldest to youngest, from Michi at age 19 to Nahyun at age 16.
Oldest to youngest
| Rank | Member | Age | Birthday | Position |
|---|---|---|---|---|
| #1 |  MichiMember | 19 | May 6, 2007 | N/A |
| #2 |  ArinMember | 18 | Jul 1, 2007 | Leader, Main Dancer |
| #3 |  KatelynMember | 18 | Jul 24, 2007 | N/A |
| #4 |  BomeMember | 18 | Nov 26, 2007 | Main Vocalist |
| #5 |  SeohyeonMember | 17 | Sep 12, 2008 | N/A |
| #6 |  AuroraMember | 16 | Jul 4, 2009 | N/A |
| #7 |  NahyunMember | 16 | Sep 3, 2009 | Visual, Maknae |