Taeyeon
Birth name: Kim Tae-yeon (Hangul: 김태연 Hanja: 金泰妍)
Date of birth: March 9, 1989 (1989-03-09) (age 20)
Position: Leader, Main Vocalist
The leader of the group, she has since ventured out into DJ-ing and reality-variety shows, along with various solo singles.
Jessica
Birth name: Jessica Jung Hangul: 제시카 정
Korean name: Jung Su-yeon (Hangul: 정수연 Hanja: 鄭秀妍)
Date of birth: April 18, 1989 (1989-04-18) (age 20)
Position: Lead Vocalist
Jessica was born and raised in San Francisco, California. She released two singles with SeoHyun and Tiffany: "Oppa Nappa" (Korean: 오빠 나빠), and "Mabinogi (It's Fantastic!)". She starred in Kim Jo-han's music video "Love is Late, I'm Sorry" and is featured in 8Eight's song, "I Love You". In their second mini-album Tell Me Your Wish (Genie), she sings a duet with SHINee's leader Onew in the track "One Year Later" (Korean: 1년 후(後)). Jessica and Park Myeong-su (Korean: 박명수) released a duet song for Infinity Challenge called, "NaengMyun" (Korean: 냉면). Her younger sister, Krystal, is a member of F(x). She also appeared in Super Junior-M's music video "Super Girl." She will be playing the main character, Elle Woods, in the Korean production of Legally Blonde - The Musical from November 2009 at the Seoul SamSungDong CoEX Atrium ==
Sunny
Birth name: Lee Soon-kyu (Hangul: 이순규; Hanja: 李順圭)
Date of birth: May 15, 1989 (1989-05-15) (age 20)
Position: Vocalist
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 was a co-DJ of ChunJi (Korean: 천방지축 라디오, literally Reckless Radio), along with Sungmin (Korean: 성민), 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" (Korean: 이제서야), on the soundtrack for the movie Story of Wine. She also co-hosts a music show called The M with SS501's Hyungjoon. She is also the niece of Lee Soo Man, the founder of SM Entertainment. She also revealed that her dad was in "Hwaljooro" (Korean: 활주로), the famous college band with Bae Chul Soo, a famous radio DJ and the host of show 7080
Tiffany
Birth name: Stephanie Hwang; Hwang Mi-yeong (Hangul: 황미영; Hanja: 黄美英)
Date of birth: August 1, 1989 (1989-08-01) (age 20)
Position: Lead Vocalist
Born in San Francisco, California but raised in Diamond Bar, California, she was discovered in the SM Starlight Casting System 2004 in Los Angeles. Along with SeoHyun and Jessica, she released a single, "Oppa Nappa" (Korean: 오빠 나빠) and "Mabinogi [It's Fantastic!]". She was the co-host of Sonyeo Sonyeon Gayo Baekso (Korean: 소년소녀 가요백서), along with Kim Hyesung from November 5, 2007 to June 13, 2008. She sang "Na Honjaseo" (Korean: "나 혼자서", "By Myself") from the Ja Myung Go soundtrack, a duet with K.Will called "Sonyeo, Sarangeul Mannada" (Korean: "소녀, 사랑을 만나다", "A Girl Meets Love"), as well as "Feeling Only You" by The Blue (Kim Min-Jong & Son Ji Chang) with Soo Young. Tiffany and Yuri currently host MBC's Music Core.
Hyoyeon
Birth name: Kim Hyo-yeon (Hangul: 김효연; Hanja: 金孝淵)
Date of birth: September 22, 1989 (1989-09-22) (age 20)
Position: Supporting Vocalist, Main Dancer
She was BoA's silhouette during a dance break in BoA's "Over the Top" performance at the MKMF Awards in 2005. Hyoyeon attended a hip hop dance school that specialized in waving, popping, locking, and animation.
Yuri
Birth name: Kwon Yu-ri (Hangul: 권유리; Hanja: 權侑利)
Date of birth: December 5, 1989 (1989-12-05) (age 19)
Position: Supporting Vocalist, Lead Dancer
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". Besides that, 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 (Korean: 못말리는 결혼), alongside Sooyoung. Yuri is also the centerpiece of K. Will's music video "Dropping the Tears" (Korean: 눈물이 뚝뚝), and appears in the music video for "JjaRaJaJja" (Korean: 짜라자짜) by Joo Hyun-Mi & SeoHyun (ft. Davichi). Apart from all her solo works, she is currently the co-host of Korean music program Music Core on MBC alongside Tiffany.
Sooyoung
Birth name: Choi Su-yeong (Hangul: 최수영; Hanja: 崔秀英)
Date of birth: February 10, 1990 (1990-02-10) (age 19)
Position: Supporting Vocalist, Dancer
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". She was previously a DJ of ChunJi (Korean: 천방지축 라디오, literally Reckless Radio), along with Sungmin of Super Junior but was soon replaced by Sunny due to schedule conflicts. Sooyoung also played a part in the sitcom Unstoppable Marriage (Korean: 못말리는 결혼), alongside Yuri and was also in the movie Hello Schoolgirl with Kang-in of Super Junior and actress Lee Yeon-hee. Currently, she hosts MBC TV program Fantastic Duo (Korean: 환상의 짝꿍). She also featured in "Feeling Only You" by The Blue (Kim Min-Jong & Son Ji Chang) with Tiffany.
Yoona
Further information: Im Yoona
Birth name: Im Yoon-a (Hangul: 임윤아; Hanja: 林潤娥)
Date of birth: May 30, 1990 (1990-05-30) (age 19)
Position: Supporting Vocalist,dancer
Yoona was the first trainee revealed to be a member of Girls' Generation and is also an actress and model. She was the lead actress in "You're My Destiny" and "Cinderella Man" and she also had a small role in 9 Ends 2 Out. She was also seen in Super Junior's "U" and "Marry U" music videos.
SeoHyun
Birth name: Seo Joo-hyun (Hangul: 서주현; Hanja: 徐珠賢)
Date of birth: June 28, 1991 (1991-06-28) (age 18)
Position: Lead Vocalist
The group's maknae. She was a 2004 SMART uniform model with TVXQ. Along with Jessica and Tiffany, they released a single "Oppa Nappa" (Korean: 오빠 나빠), and "Mabinogi (It's Fantastic!)". On February 17, 2009, her duet with trot singer Joo Hyun-Mi (Korean: 주현미), was digitally released, called "JjaRaJaJja" (Korean: 짜라자짜).

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