Kidder gained global fame as hard-nosed journalist Lois Lane - the first two "Superman" movies were great, the last two stunk - but, many forget her string of good Canadian films prior to becoming a household name.
Take a look through the gallery of stars we have sadly lost in 2018. She was best known for her role as Lois Lane in the "Superman" movies of the '70s and '80s.
Kidder kept her profile high with a critically praised performance inThe Amityville Horror in 1979, and continued to play major and minor roles in a variety of films and television series over the years, including guest roles onSmallville, Brothers & Sisters, and The L Word in recent years.
In a 2013 interview with WAToday, Kidder reiterated that she was a huge advocate for Donner, and her vocal disdain for his dismissal led to her appearing for less than five minutes in 1983's Superman III. At a time when the subject was still strictly taboo, she was fearless in talking about her own experiences in order to help others facing the same battle.
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Kidder had numerous movies' most memorable lines, including "You've got me?!"
Sarah Douglas, who played super villain Ursa in the 1978 Superman movie and Superman II in 1980, also penned an emotional tribute alongside a picture of her and Margot.
As it happens, Kidder and her Lois Lane character had a lot in common in the way of beauty, charm, wit and determination.
The official account for DC Comics, which has published the adventures of Superman since 1938, shared a message Monday afternoon about Kidder's passing. Off-screen she was one of the kindest, sweetest, most caring women I've ever known. She also dated notable stars like Steven Spielberg.
She also briefly Wednesday French director Philippe de Broca. She took a role in Rob Zombie's horror sequel Halloween 2 back in 2009.
Kidder is survived by her daughter, Maggie McGuane, whom she had in 1976 with her then-husband, Thomas McGuane, and Maggie's two children.
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