Plucky, smoky-voiced, Canadian born brunette made several American films throughout the late 1960s & 1970s before audiences took notice in Brian DePalma's eerie thriller Sisters in 1973. More roles followed before becomming a household name as the tough & beautiful Lois Lane in the 1978 blockbuster Superman.

For the next decade Margot utilized her celebrity in movies and politics. Most notably in the "Superman" sequels and her much-publicized criticism of the Gulf War.