Margot Kidder, who is best known for her role Lois Lane in the 1978 film ‘Superman‘ alongside Christopher Reeve, passed away on Sunday at her residence in Montana. The 69-year-old actress died peacefully in her sleep, said manager, Camilla Fluxman Pines, who confirmed the news.

The actress, who began her career in the 1960s appearing in low-budget Canadian films and television series before landing a lead role in Quackser Fortune Has a Cousin in the Bronx (1970), starred with Christopher Reeve in four Superman films from 1978-87 as the caped crusader’s love interest, Lois. Kidder also shared screen space with Peter O’Toole in a 1983 TV production of George Bernard Shaw’s Pygmalion, and would later appear in the TV Superman prequel Smallville. Kidder also won an Emmy Award for her role in The Haunting Hour.

Kidder’s death came as a shock to many from the Hollywood film industry. Soon as the news was out, film fraternity took to social media to condole the legend’s death on Monday. They poured out their tribute and their love for the actor on their respective social media accounts. Check out the tweets here:

On the personal front, the actress dated then-prime minister Pierre Trudeau in the 1980s. Kidder is survived by her daughter Maggie, who she had with her first husband, American novelist Thomas McGuane. After three years together, the actress divorced Thomas in 1976 and got married to ‘The Sopranos’ actor John Heard in 1979, which lasted only six days. Her third marriage was to the French director Philippe de Broca, from 1983-84. Speaking of funeral arrangements, they are still pending, according to Franzen-Davis Funeral Home and Crematory in Livingston, Montana. Watch this space for further updates.