Mary Dees nasceu o 3 de junho de 1911 em Alabama, EUA. Era atriz. Foi casada com Cornelius William Foster. Morreu o 4 de agosto de 2004 em Flórida, EUA.
Dees had been Jean Harlow's stand-in in two movies before being hired as
a double for Harlow in Saratoga (1937). She had a higher-pitched
voice than Harlow, so a second double was hired to do the voice of the
character.