Mạnh-xuân was born on March 2nd, 1970 in Hoa-kỳ. Mạnh-xuân's father was Liễm and his mother is Phượng Hoàng Thái. His paternal grandparents were Lê and Ngọc Phạm thị. He had two brothers named Mạnh-Long and Việt. He is the second oldest of the three children.