by 
Stage Name: Jessica (제시카)
Birth Name: Jessica Jung Sooyeon (제시카 정)
Korean Name: Jung Sooyeon (정수연)
Group Position : Main Vocalist
Nicknames : Ice Princess, Sica, Sicachu, Ajumma
Motto: Follow my heart ..
Languages : Korean (Fluent) , English (Fluent) , Chinese (Basic) , Japanese (Basic)
DOB: April 18, 1989
Height: 163cm
Weight: 45kg
Blood Type: B
Sibling : Younger Sister (Crystal)
School: Korea Kent Foreign School, Graduated
Religion : Christian
Casted: 2000 SM Casting System
Experience : 2009 Legally Blonde Musical (character as Elle Woods)
Duration of Training: 7 years and 6 months
Me2Day : http://me2day.net/gg_jessica
เพิ่มเติม เกิดที่โรงพยาบาลแห่งหนึ่งในแคลิฟอเนียร์ เป็นโรงพยาบาลเดียวกับทิฟฟานี่
UCC present - Jessica
