Kim Tae-yeon (born March 9, 1989), known mononymously as Taeyeon, is a South Korean singer. She debuted as a member of girl group Girls' Generation in 2007, which went on to become one of the best-selling artists in South Korea and one of South Korea's most popular girl groups worldwide, and has since further participated in other SM Entertainment projects, including Girls' Generation-TTS, SM the Ballad, and Girls' Generation-Oh!GG.
In 2015, Taeyeon released her debut extended play I, which includes the number-one titular single on South Korea's Gaon Digital Chart. In 2016, she released the number-one SM Station single "Rain", followed by her second extended play Why, which peaked atop the Gaon Album Chart. Her debut studio album, My Voice (2017), yielded the top-five singles "11:11", "Fine" and "Make Me Love You". In 2018, Taeyeon ventured into the Japanese music scene with the digital single "Stay", followed by the 2019 extended play Voice. Her second studio album, Purpose (2019), featured the successful singles "Four Seasons" and "Spark".
On television, Taeyeon appeared as a main cast on the reality shows We Got Married (2009), Begin Again (2019), and is currently serving as a main host for Amazing Saturday (2020–present). Additionally, she has recorded soundtracks for various television dramas that proved successful, notably "If" for Hong Gil-dong (2008), "Can You Hear Me" for Beethoven Virus (2008), and the chart-topping "All about You" for Hotel del Luna (2019).
Having sold over one million physical albums and twenty million digital singles as of 2021, Taeyeon is one of the best-selling solo artists in South Korea. She 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.