Cát's father was Lạn and her mother was Định Nguyễn. Her paternal grandparents were Gị and Khương Phạm. She had five brothers and two sisters, named Thiện, Thọ, Việt, Huỳnh, Hàm, Phẩm and Chức. She is the fourth youngest of the eight children. She had two half-brothers and four half-sisters, named Chúc, Tư, Cúc, Mai, Đồng and Biền.