Seohyun, 25, will be the fourth and youngest Girls' Generation member to make her solo debut, SM Entertainment said. Date and other details were not disclosed.
So far, Taeyeon, Tiffany, and Hyoyeon have debuted solo but they failed to make any noticeable success except Taeyeon. A unit group "TaeTiSeo" involving Taeyeon, Tiffany, and Seohyun was successful with the mini-album "Twinkle" in 2012.