Choi Soo-young (born February 10, 1990), better known by the mononym Sooyoung, is a South Korean singer and actress. She was a part of the short-lived Korean-Japanese singing duo, Route θ, during 2002 in Japan. After returning to South Korea in 2004, Sooyoung eventually became a member of girl group Girls' Generation in 2007.

The group went on to be one of the best-selling artists in South Korea and one of South Korea’s most popular girl groups worldwide.

Apart from her group’s activities, Sooyoung has also starred in various television dramas such as The 3rd Hospital (2012), Dating Agency: Cyrano (2013), My Spring Days (2014) and 38 Revenue Collection Unit (2016).