Diễm-Hồng was born in 1953. Diễm-Hồng's father is Cửu Nguyễn-Mộng and her mother is Dương-Liễu. Her maternal grandfather is Thọ and her maternal grandmother was Thảo Dương. She has two brothers and two sisters, named Trường, Anh-Tuấn, Bích-Ngà and Minh-Châu. She is the second oldest of the five children.