Jung Soo Jung (Hangul: 정수정; born October 24, 1994) but better known as Krystal, is an American-born South Korean idol singer and actress. Discovered by SM Entertainment in 2000, she began filming for commercials and music videos by 2002. She is currently a member of the Korean quintet girl group f(x), formed by SM Entertainment in 2009.
Krystal was born in San Francisco, California, where her family from South Korea settled in the 1980s. During a family trip to South Korea in early 2000 when Krystal was five, she was spotted by talent agency SM Entertainment, which earned her a cameo appearance in Shinhwa's "Wedding March" music video. The agency saw potential in Krystal and offered her singing and dancing lessons, opting to professionally train her in a singing career. However, the offer was turned down by her parents, reasoning that Krystal was too young. Instead, her parents allowed her older sister Jessica Jung to join the agency, who debuted as a member of the girl group Girls' Generation in August 2007.
In 2002, Krystal began appearing in television commercials. She first appeared in a Lotte commercial with Korean actress Han Ga In. In 2006, her parents allowed her to join SM Entertainment, and the agency enrolled her in dance classes, including hip hop and jazz. According to an exclusive media outlet report on August 18, Krystal has decided to part ways with her agency, SM Entertainment.

Dear Jinri
Self (archival footage)
2023

Cobweb
Yu-rim
2023

Crazy Love
Lee Shin-ah · (16 episodes)
2022

Jessica & Krystal - US Road Trip
Self · (8 episodes)
2021

Police University
Oh Kang-hee · (16 episodes)
2021

Sweet & Sour
Han Bo-yeong
2021

More Than Family
To-il
2020

Search
Shon Ye-rim · (10 episodes)
2020

SMTOWN Live | 2019 in Tokyo
Self
2019

Persona
Self (archive footage) · (1 episode)
2019

Player
Cha A-Ryeong · (14 episodes)
2018

Amazing Saturday
Self · (1 episode)
2018

Prison Playbook
Ji-ho · (16 episodes)
2017

The Bride of Habaek
Mu Ra / He Ra · (16 episodes)
2017

The Legend of the Blue Sea
Min-Ji · (20 episodes)
2016

f(x) the 1st concert DIMENSION 4 - Docking Station in JAPAN
2016

Dimension 4 - Docking Station
Herself
2016

SMTown: The Stage
Herself
2015

Hear My Song
Actress
2015

My Lovely Girl
Yoon Se-na · (16 episodes)
2014

Jessica & Krystal
Herself · (10 episodes)
2014

The Heirs
Lee Bo-na · (20 episodes)
2013

Potato Star 2013QR3
Soo Jung · (1 episode)
2013

Go! Series
(1 episode)
2013

Amazing f(x)
Herself · (8 episodes)
2013

Anna Kendrick Goes K-Pop with F(x)
Self
2013

Girls' Generation's Romantic Fantasy
Herself
2013

I AM.: SMTOWN LIVE WORLD TOUR in Madison Square Garden
Herself (as f(x))
2012
Audition 109
Min-hee

SMTown Live in Tokyo 2011 (Special Edition)
2011

High Kick: Revenge of the Short Legged
Ahn Soo Jung · (123 episodes)
2011

Weekly Idol
Herself · (1 episode)
2011

Kim Yuna's Kiss & Cry
Self · (14 episodes)
2011
Welcome to the Show
Herself · (1 episode)
2011
f(x) Koala
Herself · (15 episodes)
2010

Running Man
(3 episodes)
2010

Cutie Pie
Jung Soo-Jung (niece of Sung-Soo) · (138 episodes)
2010

SBS Entertainment Awards
Host · (1 episode)
2007
대한민국에서 건물주 되는 법
(1 episode)