Seoyoon (서윤) is a South Korean singer. She is a former member of the girl groups Luluz and WANNA.B.
2014–2016: Luluz, WANNA.B
On November 17, 2014 Seoyoon debuted as a member of Luluz with the group's first and only release "What Do You Think Of Me?", she was a member of the group until their disbandment sometime in 2015.
In 2015, she was added to the line-up of WANNA.B after three of the original members left the group. She officially debuted as a member of the group on July 20, with their debut digital single "Attention".