The more traditionally lovely Anne Archer was all set to play Lois Lane, but something about Kidder swayed director Richard Donner's mind.
Canadian-born actress Margot Kidder appeared in more than 70 movies and TV shows.
Next came the Black Christmas, The Gravy Train and A Quiet Day in Belfast, all of which came out in 1974. According to IMDB, she has roles in two upcoming films that are in pre-production. She also was the star of the massive 1979 horror film The Amityville Horror with James Brolin and Rod Steiger.
At the time, Kidder had been working on an autobiography when her laptop computer was infected with a virus, which caused it to crash and her to lose three years' worth of drafts. It said: "Thank you for being the Lois Lane so many of us grew up with".
"Acting's fun, but life's more important", Kidder told the Guardian of her professional trajectory. She was an activist all her life and much like Lane wasn't afraid to speak out for what she thought was right. She went on to appear in the film's three sequels.
She was later placed in psychiatric care.
Representatives for Amy Adams and Kate Bosworth, who've both played Lane on the big screen, did not immediately respond to HuffPost's request for comment. She then began working as a producer for the 1983 adaption of Pygmalion, which she also starred in with Peter O'Toole. She has spent time as a homeless person.
Margot battled bipolar disorder for years and was very open about it.
In recent years though Kidder has been able to steadily work in independent film and television, including in roles on Smallville, The L Word, and in Rob Zombie's Halloween II (2009). ABC News has confirmed that the 69-year-old actress passed away at her Livingston, Montana home on Sunday.
She is survived by Maggie, 41, her daughter with first husband, novelist Thomas McGuane. They posted a memorial to her on Monday, saying, "May you always be surrounded by dogs".
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