Stage Name: Taeyeon (태연).
Birth Name: Kim Taeyeon (김태연).
Group Position: Leader & Main Vocalist.
Motto: Don't do something that you'll regret later.
Nicknames: Umma, Ajumma, Kid Leader, Tete, MungTaeng (Dumb Taeyeon), Taeng, Byeon Taeng.
Languages: Korean (Fluent), English, Chinese (Basic), Japanese (Basic).
DOB: March 9, 1989.
Homeplace: Jeonrado Jeonju.
Blood Type: O.
School: Jeonju Art High School.
Interests: Makeup, Perfume, Music.
Casted: 2004 8th Annual Best Contest (Best Singer 1st Place & Grand Award).
Attended SM Academy.
-2004 Featured in The One's song "You Bring Me Joy".
-2008 DJ for MBC's Chinhan Chingu (current).
Duration of Training: 4 years and 3 months.