Mary Stayed Out All Night (Hangul: 매리는 외박중; also known as Marry Me, Mary!) is a 2010 South Korean romantic comedy television series, starring Moon Geun-young, Jang Keun-suk, Kim Jae-wook and Kim Hyo-jin. It is based on the Daum webtoon of the same title by Won Soo-yeon. It aired on KBS2 from November 8, to December 28, 2010 on Mondays and Tuesdays at 21:55 for 16 episodes.