Kim Tae-yeon (born March 9, 1989), known mononymously as Taeyeon, is a South Korean singer. She has been a member of SM Entertainment's girl group Girls' Generation since 2007, along with other SM projects including Girls' Generation-TTS, , and Girls' Generation-Oh!GG.

Before officially debuting as a solo singer, Taeyeon had recorded soundtracks for television dramas that proved successful on South Korean music charts, notably "If" and "Can You Hear Me" (2008). She released her debut extended play I in 2015, which includes the Gaon Digital Chart number-one titular single. Her second extended play Why (2016) peaked atop the Gaon Album Chart and spawned two Gaon Digital Chart top-ten singles, "Starlight" and "Why". Her debut studio album, My Voice (2017), yielded the top-five singles "11:11", "Fine" and "Make Me Love You".

Taeyeon has further released two Korean EPs, This Christmas: Winter Is Coming (2017) and Something New (2018), and a Japanese EP, Voice (2019). She was a main cast on the JTBC reality show Begin Again (2019). Her second studio album, Purpose, was released in October 2019 and featured the singles "Four Seasons" and "Spark". As of February 2020, Taeyeon has received various awards and nominations including six Golden Disc Awards, five Seoul Music Awards, three Gaon Chart Music Awards, three Melon Music Awards, and three Mnet Asian Music Awards.