Im Yoon-ah (Hangul: 임윤아; born May 30, 1990), better known by the mononym Yoona, is a South Korean singer and actress. She debuted as a member of girl group Girls' Generation in August 2007, who went on to become one of the best-selling artists in South Korea and one of South Korea's most popular girl groups worldwide.

Apart from her group's activities, Yoona has participated in various television dramas, notably You Are My Destiny (2008), marking her career breakthrough, Love Rain (2012), Prime Minister and I (2013), The K2 (2016) and The King in Love (2017).