The world is mourning the iconic Margot Kidder on Monday.
Kidder died on Sunday at her home in Livingston, Montana, PEOPLE has confirmed. She was 69. Her cause of death is unknown.
Kidder began acting in the late 1960s, but rose to fame in 1978 for her role as Lois Lane in Superman: The Movie opposite Christopher Reeve. She went on to reprise the part in the movie’s three sequels.
She also starred in several other films after the successful franchise. Her 1979 costar James Brolin remembered her after her passing.
“We had a beautiful time filming The Amityville Horror and we shared a lot of laughs. She will be missed,” Brolin said in a statement to PEOPLE.
Star Wars star Mark Hamill tweeted about Kidder: “Off-screen she was one of the kindest, most caring woman I’ve ever known.”
On-screen she was magic.
Off-screen she was one of the kindest, sweetest, most caring woman I’ve ever known.
I’ll miss you #MargoKidder.
Your legacy will live on forever. pic.twitter.com/UBlbszEIhb
— Mark Hamill (@HamillHimself) May 14, 2018
Kidder was one of many actresses to take on the role of Lois Lane. Smallville‘s Erica Durance, who played the part in the hit CW show about the early days of Superman, told PEOPLE meeting her was a highlight.
“I am shocked and extremely saddened to hear of Margot’s passing today,” she told PEOPLE. “For the moment my world is at a standstill as I contemplate her significance and contributions as an actress and a person. The first thing Margot ever said to me was, ‘You really hit it out of the park kid,’ referring to my performance as Lois Lane on Smallville, a compliment I cherish to this day. My heart goes out to Margot’s family, friends and fans. We have lost a true pioneer and giant of the Superman family.”
Other celebrities, including Joss Whedon and The Big Sick Oscar nominee Kumail Nanjiani tweeted about her death.
— Joss Whedon (@joss) May 14, 2018
RIP Margot Kidder. One of my favorite movies of hers is the original Black Christmas. It introduced some elements that are now genre tropes and she’s fantastic in it.
— Kumail Nanjiani (@kumailn) May 14, 2018
Thank you for being the Lois Lane so many of us grew up with. RIP, Margot Kidder. pic.twitter.com/IhY73TB52P
— DC (@DCComics) May 14, 2018
So sadly Margot Kidder who played the iconic Lois Lane in the Superman movies passed away today. Thank you for the world you helped create and being the …
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