Mona Elly Hou Vangsaae (24 April 1920 – 17 May 1983) was a Danish ballet dancer, choreographer and instructor.

The roles of Julie in Frederick Ashton's Romeo and Juliet and Aili in Birgit Cullberg's The Moon Reindeer were created for her.

She married twice, first in 1942 with the hairdresser Børge Angelo Jahncke (1911–1975) and then in 1946 with the principal dancer and ballet master Frank Schaufuss (1921–1997).

She went on to perform as the woman in Metaphor by Nini Theilade in 1950 and in 1955 the cocotte in George Balanchine's La sonnambula.

In the late 1970s and early 1980s, she helped her son Peter with productions of La Sylphide and Napoli in Toronto, Marseille, Stuttgart and Berlin.