About Choi Soo-young
Choi Soo-young (Korean: 최수영; born February 10, 1990), known mononymously as Sooyoung, is a South Korean singer, actress, and songwriter. She was a member of the short-lived Korean-Japanese singing duo Route 0, which debuted in Japan in 2002. After returning to South Korea in 2004, Choi eventually became a member of girl group Girls' Generation in 2007, which went on to become one of the best-selling artists in South Korea and one of South Korea's most widely known girl groups worldwide. Apart from her group's activities, Choi has also starred in various television dramas such as The Third Hospital (2012), Dating Agency: Cyrano (2013), My Spring Days (2014), Squad 38 (2016), Man in the Kitchen (2017–2018), Tell Me What You Saw (2020), and most recently in Run On (2021), So I Married the Anti-fan (2021), If You Wish Upon Me (2022), Not Others (2023), Second Shot at Love (2025), and I Dol I (2026). In October 2017, Choi announced that she had left SM Entertainment, although she clarified that she would continue to be a member of Girls' Generation. She joined Echo Global Group and released her first solo single "Winter Breath" in 2018, before moving to Saram Entertainment in 2019. In October 2024, Choi made her solo debut in Japan with the release "Unstoppable", under Japan label Avex Trax. Choi was initially discovered through an SM Entertainment Open Audition when she was in fifth grade. She later won first place at the 2002 Korea-Japan Ultra Idol Duo Audition and debuted in Japan as a member of Route 0.
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.