Alexandra Christina, Gravin van Frederiksborg (Hongkong, 30 juni 1964), als "Alexandra Christina Manley") is de voormalige echtgenote van de prins Joachim van Denemarken. ###>Countess Alexandra of Frederiksborg, (born Alexandra Christina Manley on 30 June 1964) was the first wife of Prince Joachim of Denmark, the younger son of Queen Margrethe II.