J E S S I C A (제시카)
Stage Name: Ice Princess JESSICA (얼음공주 제시카 – eoleum gongju Jessica)
Birth Name:
 Jessica Jung (제시카 정)
Korean Name:
 Jung Soo-yeon (정수연)
Nicknames: 
Sica, Jessi, Jess, Sergeant Sic, General Sic, Sicachu, Sickal (knive), Sica-sama
Position: Main Vocalist
Date of Birth: April 18, 1989
Zodiac Sign:
 Aries
Bloodtype: B
Sibling(s): 1 younger sister (Krystal Jung)
Language: Korean (Fluent), English (Fluent), Chinese (Basic), Japanese
Specialty: Dance
Casted:
 2000 SM Casting System
Training Duration:
 7 Years 6 Months
School: Korea Kent Foreign School (K.K.F.S.) [graduated]
Career:

- 2007 MV Kim Jo Han – Love is so late, I’m sorry
- 2007 Featured with 8eight ‘I Love You
- 2009 Featured with Park Myung Soo ‘Naengmyun
- 2009 MV Super Junior M – Super Girl
- 2009 Musical Legally Blonde – The Musical‘ (as Elle Woods)
- 2010 CF Song for SPC Corp. (Dunkin Donuts, Paris Baguette, Baskin Robbins) ‘Sweet Delight
2011 OST for KBS drama Romance Town ‘Because Tears are Overflowing
TRIVIA
  • Nicknamed as Ice Princess, Sergeant Sic, and Sica-sama because of the cold, predominant vibe she has.
  • Jessica is often considered as a real-life tsundere; A tsundere is a Japanese manga/anime character development process that describes a person who is initially cold and even hostile towards another person before gradually showing their warm side over time.
  • Jessica was born in San Francisco, California. After street-casted by SM Entertainment when she was 11 year-old, she and her family moved to South Korea.
  • Jessica trained for more than seven years before debuting with SNSD, making her the one who trained longest among the nine members.
  • Her younger sister, Krystal Jung, is a member of label-mate idol group, f(x).
  • Jessica is allergic to cucumber.
  • Jessica is SNSD’s resident sleepy-head. She can sleep up to 16 hour a day and is the hardest member to wake up.
  • Jessica once revealed that her hobbies are soccer and boxing. She also loves reading books and magazines.
  • She made her musical debut as Elle Woods in the musical adaptation of Legally Blonde.
  • A “Sica Effect” (Sica Hyogwa) is when the atmosphere went down or turned cold once Jessica said something.
  • Jessica is close to FinKL’s Ock Juhyun and actress Park Minyoung of drama Sungkyunkwan Scandals fame.