• Birthplace: Cheongdam-dong, Seoul, South Korea
• Age: 34
• Height: 170
• Weight: 0
• Website: N/A

Choi Soo-young, commonly known as Sooyoung (수영), is a South Korean actress and singer. Sooyoung made her singing debut in the Korean-Japanese girl group, Route 0, which was active from 2002 until 2003. In 2007, she became a member of the renowned K-pop girl group, Girls' Generation, with the roles of a lead dancer, lead rapper and supporting vocalist.

In her acting career, Sooyoung is well known for her roles in My Spring Days, The 3rd Hospital and Dating Agency Cyrano.

In October 2017, it was reported that Sooyoung didn't resign her contract under SM Entertainment (Girls' Generation's record label), with plans of focusing mainly on her acting career. In November 2017, Sooyoung signed a contract with Echo Global Group, for their management. Her future activities with Girls' Generation remain in question.

Sooyoung was born in Gwangju, Gyeonggi Province, South Korea into a wealthy family on February 10, 1990. She has an older sister, Choi Soo-jin, who is a musical theatre actress. Her parents are Moon So-hee and Choi Jungnam.

Sooyoung graduated from JeongShin Womens High School (Korean: 정신 여자 고등학교) in 2009. On February 15, 2016, Sooyoung and her fellow SNSD member, Yuri graduated Chung-Ang University both with degrees in Performing Arts and Theatre as well as Lifetime Achievement Awards. Sooyoung and Yuri were created ambassadors for their university in May 2014.

ooyoung was discovered on SM Casting System via the 2000 SM Open Audition. She then auditioned for the 2002 Korea-Japan Ultra Idol Duo Audition and won first place, subsequently Sooyoung was sent to Japan and debuted as a member of the duo Route θ, alongside Marina Takahashi. The band released three singles: "Waku! Waku! It's Love", "Start", and "Painting", and 3 B-Sides : Go Go Happy!!, Kimi Ni Ae Ta Kara (君に会えたから) and Onna No Ko Magic (女の子マジック). The group was later disbanded in 2003.

Sooyoung came back to Korea and had more training, before she became a member of Girls' Generation in 2007, given the roles of a supporting vocalist and a lead dancer in the group.

Sooyoung sang the song "Kkok" with Kwon Yuri for the series, Working Mom. Featured on The Blue's song, Feeling Only You with Tiffany Hwang and sang the song Wild Flower, which was used as My Spring Days' OST.

In terms of singing, Sooyoung's vocal range is E3-A5.

Sooyoung co-wrote the song, How Great Is Your Love? with Jenny Hyun, which was put on Girls Generation's album, The Boys and collaborated with Seohyun and Yuri to write the song, Baby Maybe for The Boys album.

In February 2017, Sooyoung revealed that Girls Generation's comeback for 2017, would be in the second half of the year.

As an actress, Sooyoung is well known for her roles in My Spring Days, Dating Agency Cyrano and The 3rd Hospital, she has gained recognition as an actress and was considered the best actress in Girls Generation by Oh Ji Ho for her role in The 3rd Hospital. Sooyoung has won several awards for her acting pursuits such as Excellence Award for her role in My Spring Days and The New Rookie award for her role in The 3rd Hospital.

In October 2017, Sooyoung alongside fellow Girls Generation members Tiffany and Seohyun, didn't resign her contract under SM Entertainment for their management. Shortly after, she removed 'Girls Generation' from her Instagram page, leaving fans to speculate that she has no plans of continuing as a member of Girls Generation. Though, whether or not she will continue as a group member has not been officially confirmed.