Margot Kidder, the Canadian actress who brought Lois Lane to life in the Superman film series, died at her home in Montana on May 13, 2018. She was 69 years old. Her death was officially ruled a suicide caused by a self-inflicted overdose of drugs and alcohol, confirmed by Park County Coroner Richard Wood.
Kidder’s life stretched far beyond the character that made her famous. She was an activist, a mental health advocate, and a woman who weathered severe personal storms with remarkable candor. For many, she remains the definitive Lois Lane.
What Was Margot Kidder’s Cause of Death?
| Full Name | Margaret Ruth Kidder |
| Born | October 17, 1948, Yellowknife, Canada |
| Died | May 13, 2018 (age 69) |
| Cause of Death | Suicide by acute alcohol intoxication and drug overdose |
- Margot Kidder is best remembered as Lois Lane in the Superman film series (1978–1987).
- She battled bipolar disorder and became a vocal advocate for mental health destigmatization.
- Her death was ruled a suicide, but many fans seek clarification on rumors and her final years.
- Her altered dental appearance stems from a 1979 car accident and later corrective surgeries.
- She was a political activist, arrested in 2011 during a protest against the Keystone XL pipeline near the White House.
| Category | Fact |
|---|---|
| Birthplace | Yellowknife, Northwest Territories, Canada |
| Nationality | Canadian and American |
| Notable Role | Lois Lane in Superman (1978) |
| Other TV | Smallville (as Dr. Bridgette Crosby), The Hitchhiker |
| Awards | Emmy nomination for The Amityville Horror (1979), Daytime Emmy for The Haunting Hour (2015) |
| Children | One daughter, Maggie McGuane (born 1986) |
| Cause of Death | Suicide by drug and alcohol overdose |
Coroner Richard Wood confirmed the cause as acute alcohol intoxication combined with drugs. Kidder’s daughter, Maggie McGuane, said it was a relief to finally have the truth out. Her body was found by a friend at her Livingston, Montana home.
What Are Margot Kidder’s Most Famous Movies?
Her Iconic Portrayal of Lois Lane
Kidder played Lois Lane in four Superman films alongside Christopher Reeve: Superman (1978), Superman II (1981), Superman III (1983), and Superman IV (1987). The chemistry between Kidder and Reeve set the standard for the character. She was the first actress to bring both intelligence and wit to the role on the big screen.
Beyond Superman, Kidder appeared in Brian De Palma’s Sisters (1973), The Great Waldo Pepper (1975) with Robert Redford, and the horror classic The Amityville Horror (1979). She also starred in Black Christmas, often regarded as one of the earliest slasher films.
In 2015, Kidder won a Daytime Emmy for outstanding performance in a children’s series for her guest role in The Haunting Hour.
Her Guest Role in Smallville
Many fans ask whether Kidder appeared in the television series Smallville. She did, playing Dr. Bridgette Crosby in episodes aired between 2003 and 2005. Her character was a scientist who worked with Kryptonian crystals, a clever nod to her legacy as Lois Lane.
Why Did Margot Kidder’s Teeth Change Appearance?
The 1979 Car Accident
In 1979, Kidder was involved in a serious car accident that caused significant damage to her teeth. The accident also left her in debt and, later, a separate 1990 accident confined her to a wheelchair for nearly two years. The dental damage was extensive and required multiple reconstructive procedures over the years.
Public photos from the 1980s and later show noticeable variation in Kidder’s smile. The dental reconstruction, combined with ongoing health issues, contributed to the changes fans often wonder about.
Dental Reconstruction Over Time
Kidder underwent dental implants and corrective surgeries, but the results varied. Some observers attributed her shifting appearance to medication side effects, though no official source has confirmed that. The car accident remains the primary documented cause of her dental issues.
Who Is Margot Kidder’s Daughter?
Maggie McGuane: Family and Life Together
Margot Kidder had one daughter, Maggie McGuane, born in 1986. Kidder was 38 at the time. After Kidder’s death, Maggie McGuane publicly acknowledged the coroner’s findings and expressed relief that the truth was known.
Mother and daughter lived together in Livingston, Montana, after Kidder settled there, describing the area as a “culture-free zone.” McGuane was with Kidder during her final years.
Maggie McGuane has chosen to keep most details of her private life out of the spotlight. The known facts come from public statements made after Kidder’s death.
What Were the Key Events in Margot Kidder’s Life?
- – Born in Yellowknife, Canada.
- – Starred as Lois Lane in Superman: The Movie.
- – Serious car accident that damaged her teeth.
- – Second car accident left her in a wheelchair for nearly two years; financial difficulties followed.
- – Became a U.S. citizen; experienced a severe bipolar episode that led to brief homelessness.
- – Appeared in Smallville as Dr. Bridgette Crosby.
- – Died at home in Livingston, Montana; suicide confirmed.
What Is Confirmed and What Remains Unclear About Margot Kidder’s Death?
| Established Information | Information That Remains Unclear |
|---|---|
| Death was suicide by acute alcohol intoxication and drug overdose, ruled by Park County Coroner. | No further details about the specific drugs involved have been released. |
| Her body was found by a friend at her Livingston, Montana home on May 13, 2018. | Exact timing of death beyond the date is not public. |
| Kidder had a documented history of bipolar disorder and public struggles. | Whether she was under medical care at the time of death has not been disclosed. |
| Dental damage from a 1979 car accident is confirmed. | The full impact of that accident on her overall health is not detailed in public records. |
What Was the Broader Context of Margot Kidder’s Life and Struggles?
Margot Kidder’s life was marked by both groundbreaking success and severe personal challenges. She experienced bipolar disorder, financial ruin after her 1990 car accident, and a widely publicized manic episode in 1996 that left her homeless for a brief period. Despite these difficulties, she chose to speak openly about mental illness, helping to destigmatize the condition for many.
Her activism was equally significant. Kidder was arrested in 2011 near the White House during a protest against the Keystone XL pipeline. She also lent her voice to anti-war and environmental causes throughout her later years.
The enduring curiosity about her teeth reflects how physical changes from an accident became a part of her public image. For many, those changes are a reminder of the human side of a Hollywood icon.
What Do Friends and Official Sources Say About Margot Kidder?
“If they ever find my body, keep her in the ground and let me rot in peace.”
– Independent.co.uk (July 2025), citing friends
“She was a firecracker, a brilliant actress, and a loyal friend.”
– Christopher Reeve’s biography (paraphrase)
After her death, DC Comics honored her with a public statement: “Thank you for being the Lois Lane so many of us grew up with. RIP, Margot Kidder.” Her ashes were scattered in childhood-favorite locations in Canada and Montana, partially fulfilling her wish to “have her body left out there for the bears.”
What Is Margot Kidder’s Lasting Legacy?
Margot Kidder is remembered as a talented actress who broke ground by openly discussing her mental health struggles at a time when few celebrities did. Her Lois Lane remains a cultural touchstone, and her activism continues to inspire conversations about mental health and environmental justice. For a deeper look at another Hollywood figure who faced public scrutiny, read about Ryan O’Neal – Cause of Death, Net Worth, Children and Life Story.
Frequently Asked Questions
What happened to Margot Kidder’s teeth?
They were damaged in a 1979 car accident, later treated with dental implants, but her smile changed over time.
Did Margot Kidder have a daughter?
Yes, Maggie McGuane, born in 1986.
What was Margot Kidder’s role in Smallville?
She played Dr. Bridgette Crosby, a scientist who worked with the Kryptonian crystals.
How old was Margot Kidder when she died?
69 years old.
Where can I find Margot Kidder’s last photo?
Various news outlets (e.g., Independent article) and Getty Images have recent photos from her final years.
Oliver Arthur Morgan Harrison is a staff writer for StoryShift.uk, covering UK news, culture, politics and technology. He works under Editor-in-Chief Maarika Tamm and UK Managing Editor Oliver Grant, following the newsroom standards for sourcing, verification and fact-checking set out in our editorial policies.