(Source: Pinterest/Kaitlin R)
3. Marlene Dietrich
The worldly Marlene Dietrich was an iconic film actress, humanitarian, and one of the first women to ever be photographed in pants, to boot (!). In fact, she single-handedly helped to put pantsuits for women on the map. We're pretty sure no one has ever looked so good in trousers, before or since.

Photo found here.