Taeyeon
* Birth name: Kim Taeyeon
* Date of birth: March 9, 1989 (1989-03-09)
* Discovery: 2004 8th Annual Best Contest (Best Singer 1st Place & Grand Award)
* School(s): Jeonju High School
* Experience: Solo "If" , Hong Gil Dong OST and "Can you Hear me" , Beethoven Virus OST, Heading to the Ground OST
* Position : Main Vocalist, Leader
* Received received the YEPP Popularity Award for her solo "Can you Hear Me", Beethoven Virus OST
* Has been part of the reality show We Got Married with her virtual husband Jung Hyung-don
* Former DJ of Chin Chin Radio
* Currently one of the co-hosts on KBS celebrity talk show "Win Win"
* Currently preparing for her upcoming musical "Midnight Sun"Taeyeon has a melodious voice
Jessica
* Birth name: Jessica Jung
* Date of birth: April 18, 1989 (1989-04-18)
* Discovery: 2000 SM Casting System
* School(s): Korea Kent Foreign School
* Position : Lead Vocalist
* Stars as Elle Woods on Korea's Legally Blonde Musical
* Did a duet with Park Myungsoo for their single "Naengmyun"
Jessica was born and raised in San Francisco, California and is fluent in English. She moved to Korea when she was 11 for training. She released 2 singles alongside with SeoHyun and Tiffany: "오빠 나빠" ("Bad Oppa") and "Mabinogi (It's Fantastic!)". Jessica also stars in Jo Han Kim's music video "Love is Late, I'm Sorry".
Sunny
* Stage name: Sunny (Hangul: 써니)
* Birth name: Lee Sunkyu (Hangul: 이순규; Hanja: 李順圭)
* Date of birth: May 15, 1989 (1989-05-15)
* Discovery: 2007 SM Casting System
* School(s): Baehwa All-Girls High School
* Position : Sub Vocalist
○ Currently on KBS Invincible Youth with Yuri
Sunny was a trainee under a different entertainment company before she transferred into SM Entertainment. After several months of training under SM Entertainment in 2007, Sunny debuted as a member of Girls' Generation that same year. She is the niece of SM Entertainment's CEO, Lee Soo Man, and her father was once the manager of the disbanded K-pop girl group Sugar. She was a co-DJ of Reckless Radio along with Sungmin of Super Junior until the broadcast ended on the July 30, 2008. Sunny appeared in Super Junior-H's music video for "Cooking? Cooking!". Sunny also sang the song "Finally Now" on the soundtrack for the movie Story of Wine. She will be hosting a Music Show called "The M" with fellow member of SS501 Hyung Joon.
Tiffany
* Stage name: Tiffany (Hangul: 티파니)
* Birth name: Stephaine Hwang; Hwang Miyoung (Hangul: 황미영; Hanja: 黄美英)
* Date of birth: August 1, 1989 (1989-08-01)
* Discovery: 2004 Casting System (Los Angeles, California)
* School(s): Korea Kent Foreign School
* Position : Sub Vocalist
* Current MC of Music Core with Yuri
* Has released her first single entitled "By Myself"
Tiffany was raised in Diamond Bar, California and is fluent in English. She was discovered in the SM Starlight Casting System 2004 in Los Angeles and began her training under the label until the debut of Girls' Generation. Along with SeoHyun and Jessica, she released a single, "Bad Boyfriend" (오빠 나빠) and Mabinogi [It's Fantastic!].
Hyoyeon
* Stage name: Hyoyeon (Hangul: 효연; Hanja: 孝淵)
* Birth name: Kim Hyoyeon (Hangul: 김효연; Hanja: 金孝妍)
* Date of birth: September 22, 1989 (1989-09-22)
* Discovery: 2000 SM Casting System
* School(s): Studied in Beijing, China for Mandarin Chinese
* Position : Main dancer
Hyoyeon once attended a hip hop dance school that specializes in waving, popping, locking, and animation. Prior to her debut, Hyoyeon traveled to Beijing, China in 2004 with Super Junior's Siwon to learn Mandarin and more about Chinese culture. She is one of the main dancers in Girl's Generation.
Yuri
* Birth name: Kwon Yuri (Hangul: 권유리; Hanja: 權侑莉)
* Date of birth: December 5, 1989 (1989-12-05)
* Discovery: 2001 SM 1st Annual Youth Best Contest
* School(s): NeungGok High School
* Position : Lead Dancer
* Experience:
* Appeared in KM Super Junior Show The King's Boyfriend (2005)
* Featured in TVXQ's "Beautiful Life" music video
* Featured in commercials for Choco Pie, Dongil Highvill, and Hot Choco Mite
* Acted in Attack on the Pin-Up Boys
* Starred in MBC sitcom Unstoppable Marriage
* Current MC of Music Core with Tiffany
* Currently on KBS Invincible Youth with Sunny
Yuri joined the label when she took 1st place in the 2001 1st SM Youth Best Dancer Contest. She appeared in TVXQ's "Beautiful Life" music video and had a small role as a ballerina in Super Junior's first movie, Attack on the Pin-Up Boys. She also had a small role in a television segment, "The King's Boyfriend," which was part of the 2005–2006 KMTV Super Junior documentary, Super Junior Show. Yuri also played a part in the sitcom Unstoppable Marriage alongside Sooyoung.
Sooyoung
* Birth name: Choi Sooyoung (Hangul: 최수영; Hanja: 崔秀英)
* Date of birth: February 10, 1990 (1990-02-10)
* Casted: 2002 Korea-Japan Ultra Idol Duo Audition
* School(s): Jungshin All-Girls High School
* Position : Sub vocalist and sub dancer
* Experience:
* Debuted in Japan in the duo Route 0 (2002)
* Featured in commercials for Samsung Anycall
* Modelled for Japan Chubbygang and Skoolooks
* Starred in MBC sitcom Unstoppable Marriage
* Starrred in the film Pure Manhwa — Happily Ever After
Before Sooyoung's audition to Girls' Generation, she made a brief debut in Japan as a singer in the group called Route φ. She first debuted with Marina Takahashi with the song "Start". While in Japan, she became close friends with BoA and Sunday from The Grace as they too were working in Japan as singers at the time. She was previously a DJ of ChunJi along with Sungmin of Super Junior. She was soon replaced by Sunny due to schedule conflicts. Sooyoung also played a part in the sitcom Unstoppable Marriage alongside Yuri. Her High School Graduation was on February 10, 2009. Though she didn't attend the cermony she still graduated.
Yoona
* Birth name: Im Yoon Ah (Hangul: 임윤아; Hanja: 林允兒)
* Date of birth: May 30, 1990 (1990-05-30)
* Discovery: 2002 SM Saturday Open Casting Audition
* School(s): Daeyoung High School
* Position : Lead Dancer
* Awards/Recognitions
* 2008 Korean Drama Festival: Netizen Popularity Award (You Are My Destiny)
* 2008 KBS Drama Awards: Best New Actress Award (You Are My Destiny)[10]
* 2008 KBS Drama Awards: Netizen Award
* Experience:
* Featured in music videos for TVXQ's "Magic Castle, The Grace's "열정 (My Everything)", Super Junior's "U" and "Marry U", Lee Seung Chul's "Propose"
* Featured in commercials for Sanyo Eneloop, Teun Teun English, Elite, Sunkist Lemondae, Clean & Clear, Sola VitaminC, YeJiMiIn
* Starred in MBC dramas 9 Hits, 2 Outs and Park Jung Geum, and KBS drama You Are My Destiny, MBC drama Cinderella Man
Yoona has appeared in several music videos and commercials. She gained a minor role in the Korean drama, 9 Ends 2 Outs (9회말 2아웃) and won a major role in a new drama, You Are My Destiny. In this drama, Yoona portrays a girl who was once blind. You Are My Destiny has the highest rating and number of viewers for daily dramas in its time slot, beating other per popular dramas from major Korean networks, MBC and SBS.[not in citation given] Yoona has been accepted by Dongguk University and will continue her studies. On February 10, 2009 YoonA was spotted at her High School Graduation.
Seohyun
* Stage name: SeoHyun (Hangul: 서현; Hanja: 徐玄)
* Birth name: Seo Joohyun (Hangul: 서주현; Hanja: 徐珠賢)
* Date of birth: June 28, 1991 (1991-06-28)
* Discovery: 2003 SM Casting System
* School(s): Daeyoung High School
* Position : Lead vocalist
* Experience:
* 2004 SMART Uniform Model
* Currently on the reality show "We Got Married" (2010) with her husband "Yong Hwa of CN. Blue
