Yoo So-young (Korean: 유소영; born March 29, 1986)[1] is a South Korean actress, She debuted as a singer as a member of the girl group After School, before she graduated in late 2009.

[3] Yoo So-young debuted with After School's unofficial first appearance on December 29, 2008, at the SBS Song Festival, performing "Play Girlz" with Son Dam-bi.

Prior to that, she made an appearance on KBS "TV Kindergarten One Two Three" as Hana; she also took part in 75th "Miss Chunhyang pageant", winning second place, in 2005.

After School officially debuted in January 2009.

She graduated from the group on October 29, 2009, to pursue a career in acting.