Seo Joo-hyun

Seo Ju-hyun (; born June 28, 1991), known professionally as Seohyun, is a South Korean singer, actress, and songwriter. She debuted as a member of girl group Girls' Generation (and later its subgroup Girls' Generation-TTS) in August 2007, which went on to become one of the best-selling artists in South Korea and one of South Korea's most widely known girl groups worldwide. Seohyun released her first extended play Don't Say No in 2017.

She left SM Entertainment later that year, although she remains as a member of Girls' Generation. Aside from her music career, she has established herself as an actress. Following her supporting role in the television drama Passionate Love (2013) and Moon Lovers: Scarlet Heart Ryeo (2016), she starred in Bad Thief, Good Thief (2017), Time (2018), Private Lives (2020), Jinxed at First (2022), Song of the Bandits (2023) and The First Night with the Duke (2025).

Her film work includes Love and Leashes (2022) and Holy Night: Demon Hunters (2025). She also participated in the original and Korean versions of stage musicals including Moon Embracing the Sun, Gone with the Wind and Mamma Mia.