Born in 1990 and debuting before she was a teen, Choi Soo-young, better known as Sooyoung of Girls’ Generation, has become one of K-pop’s most successful idol-to-actor stories. With her Japanese single Unstoppable and recent dramas, interest in her story is rising again.
This Choi Sooyoung biography tracks how a young auditionee became part of a legendary girl group, then an award-winning K-drama lead and philanthropist. For fans wondering what she is doing now, here is the timeline.
Choi Sooyoung Biography: Profile and Idol Beginnings
Choi Soo-young was born on February 10, 1990, in Gwangju, Gyeonggi, South Korea. She is the younger sister of musical theatre actress Choi Soo-jin and later studied theater and film at Chung-Ang University, graduating in 2016 after finishing JeongShin Women’s High School in 2009.
Discovered through SM Entertainment’s Open Audition while still in elementary school, Sooyoung soon won first place at the 2002 Korea-Japan Ultra Idol Duo Audition. She debuted in Japan that same year in the duo Route 0, releasing three singles before the project ended in 2003.
After returning to Korea, she spent several years as an SM trainee before re-debuting in August 2007 as a lead dancer and rapper in Girls’ Generation with the single Into the New World. Their 2009 hit Gee cemented the group as one of K-pop’s defining acts, while Sooyoung co-wrote group ballads including Sailing (0805).
From Girls’ Generation to K-drama Star
While still promoting with Girls’ Generation, Sooyoung built an acting resume through small roles in projects like sitcom Unstoppable Marriage. Her first major turning point came with tvN medical drama The Third Hospital in 2012, where her performance earned praise from senior co-stars.
Lead roles followed quickly: she fronted Dating Agency: Cyrano in 2013, then played a heart transplant recipient in MBC drama My Spring Days in 2014. The performance earned her Excellence acting prizes at the MBC Drama Awards and Korea Drama Awards, and she recorded OST song Wind Flower.
She kept stretching with crime series Squad 38, special drama Perfect Sense, thriller Tell Me What You Saw, and romantic titles Run On and So I Married the Anti-fan, plus an appearance in Netflix series Move to Heaven. More recently, she led If You Wish Upon Me and I Dol I, playing a boy group fangirl who becomes a lawyer.
Agencies, Solo Music, Philanthropy, and Personal Life
In October 2017, Sooyoung left SM Entertainment but explained that she would remain a Girls’ Generation member, later joining Echo Global Group and then Saram Entertainment in 2019. She reunited with SNSD for the 2022 anniversary album Forever 1, co-writing Seventeen and Villain.
Her solo music side began with single Winter Breath in 2018 and promotional track Be Yourself in 2020, then expanded overseas with Japanese maxi single Unstoppable in October 2024 under Avex Trax.
Sooyoung is known for charity work: since 2012 she has supported Korea’s Retinitis Pigmentosa Society and in 2016 launched clothing brand Beaming Effect to raise awareness and research funds. A Christian who reportedly prays before performances, she has been dating actor Jung Kyung-ho publicly since 2014.