Im Da Young, known mononymously as Dayoung, is a member of the South Korean girl group Cosmic Girls (WJSN).

Dayoung is a South Korean singer and actress who was born in Jeju, South Korea, on May 14, 1999. She made her debut as a member of the K-pop girl group WJSN (also known as Cosmic Girls) on February 25, 2016, with the EP “Would You Like?” She contributed a song to the soundtrack of “Meow, The Secret Boy” in 2020 and made her acting debut in the drama series “Love Revolution” (2020).