Girls' Generation (소녀시대; 少女時代) is a five-member girl group formed by SM Entertainment in 2007. They debuted with nine members on SBS's Inkigayo on August 5, 2007 by performing their first single "Into the New World". The current members are Taeyeon (the leader), Sunny, Hyoyeon, Yuri, and Yoona. Jessica left the group in 2014, while Tiffany, Sooyoung, and Seohyun left in 2017.
They are often referred to as SoShi (소시), or SNSD (mainly outside Korea), the first of which is an abbreviation and the second an acronym of the group's Korean name So Nyeo Shi Dae (or So Nyuh Shi Dae). In China, they are known as 少女時代 (Shàonǚ Shídài; or Siu Nui Si Doi in Hong Kong) and in Japan as 少女時代 (Shōjo Jidai).