Margot Kidder, the Lois Lane to Christopher Reeve's Superman, Dead at 69

'Superman' Star Margot Kidder Dead at 69

Annie Wersching 'Star Trek' and '24' Actress Dead at 45

'Southern Charm’ Star Olivia Flowers' Brother Conner Dead at 32

Pro Wrestler Jay Briscoe Dead at 38

Tatjana Patitz, Iconic '90s Supermodel, Dead at 56

Stuntman Evel Knievel's Son Robbie Dead at 60

Cindy Williams of 'Laverne & Shirley' Dead at 75

Former Detroit Lions Linebacker Jessie Lemonier Dead at 25

Lisa Loring, Original Wednesday Addams Actress, Dead at 64

'Sopranos' Actor John Ventimiglia's Daughter Odele Dead at 25

Comedian Rickey Smiley Grieves Son Brandon, Dead at 32

David Crosby Singer of Crosby Stills & Nash Dead at 81

2023 Oscar Nominations: Snubs and Surprises

Channing Tatum Praises Co-Star Salma Hayek at ‘Magic Mike’s Last…

Jessica Simpson Recalls Secret Romance With 'Massive Movie Star'

Tim Allen Flashes 'Home Improvement' Co-Star in Resurfaced Clip …

'Sister Wives' Star Meri Brown Calls Out Media for Misinformatio…

'MILF Manor': First Look at TLC's New Dating Series (Exclusive)

Performances to Watch at 2023’s Must-See Music Awards
Actress Margot Kidder has died, ET can confirm.
Kidder, who's best known for her role as Lois Lane in Superman, died "peacefully in her sleep" on Sunday, her manager, Camilla Pines, tells ET.
Franzen-Davis Funeral Home and Crematory in Livingston, Montana, tells ET that Kidder died at her home. The cause of death is unknown. She was 69 years old.
Kidder starred alongside the late Christopher Reeve in 1978's Superman, and reprised the high-profile role in three more films. More big parts included roles in 1979's The Amityville Horror and 1975's The Great Waldo Pepper opposite Robert Redford.
She was also a theater actress, notably appearing in a 2002 production of The Vagina Monologues. The Canadian actress worked steadily throughout her life, including as recently as earlier this year, with projects still being in pre-production according to IMDB.
Kidder was also known for being outspoken about mental illness since making headlines in 1996 after she disappeared for four days and was found in a backyard in Glendale, California. Kidder later said she suffered a manic episode.
Kidder had been married and divorced three times. She is survived by her daughter, Maggie McGuane, whom she shared with her first husband, novelist Thomas McGuane.
RELATED CONTENT:
Glenn Close Emotionally Declares If Christopher Reeve Was Alive, Robin Williams 'Would Be Too'
EXCLUSIVE: Christopher Reeve's Son Remembers His Late Father's 'Fierce Determination'