Yoo Si-ah (Korean: ์ ์์; born Yoo Yeon-joo on September 17, 1995), known professionally as YooA (์ ์), is a South Korean singer and actress. She is a member of the girl group Oh My Girl under WM Entertainment. She made her debut as a solo artist, with her first EP Bon Voyage, on September 7, 2020.
