Ngọc-Thanh was born on March 1st, 1943. Ngọc-Thanh's father is Trì and her mother was Chi Nghiêm bá. Her paternal grandparents were Kiện and Quế Nguyễn quí. She had four brothers named Trí, Hùng-Thiết, Dũng and Tuấn Hải. She is the second oldest of the five children.