Margot is of French-Canadian heritage.

Aunt of actress Janet Kidder. They both appeared in the same episode ("Walk on By") as Nikita's mother Roberta, young and old, in the TV series "La Femme Nikita" (1997).

After living in the US for 34 years, she became a US citizen so she can vote against George W. Bush as part of her protest against the war in Iraq. [August 2005]

Along with Christopher Reeve, Jackie Cooper, and Marc McClure, she is one of only four actors to appear in the first four Superman films: Superman (1978), Superman II (1980), Superman III (1983), and Superman IV: The Quest for Peace (1987).

Dated Pierre Trudeau.

Went to 11 schools in 12 years.

Daughter, Maggie, with first husband (b. 1976).

Shared a beach house in California with actress Jennifer Salt in the 1970s.

Due to her role as "Lois Lane" in the popular four-film Superman series, the road in which she lived as a youngster in Yellowknife, Northwest Territories, Canada, was renamed Lois Lane.

On Aug 25, 2002, she suffered a broken pelvis near Belfast, Maine, when her GMC Yukon hit a raised pavement and rolled over several times. She had just come from hosting the 15-Minute Festival, a series of original plays staged at the National Theatre Workshop of the Handicapped. She was on her way to Montreal at the time of the accident. Kidder's friend, David Stuckey, said that the actress won't require surgery but will remain for several days at Waldo County General Hospital in Belfast. Stuckey said Kidder was in a lot of pain. "But she's in good spirits," he said. "She's OK."

Best known as Superman's favorite person, Lois Lane. Her much publicized behavior in 1996 was due to manic depression. She was living in a state of paranoia, convinced that her first husband was trying to kill her. Kidder soon lived as one of the homeless. She narrowly escaped being raped, and wandered about the streets of Los Angeles (barely recognizable after cutting her hair off and removing some of her dental work) before hiding underneath a family's porch that was located near the studio where Superman (1978) was filmed. Fortunately, her life is back on track after having faced the "demons" of her condition.

Found by police in a distressed state, hiding in someone's garden claiming she'd been stalked and attacked. Had apparently cut her hair off with a razor blade. Placed in psychiatric care. Police said there was nothing to support her story. [24 April 1996]

Was in a serious car crash in 1990 and couldn't work for two years. She went bankrupt.

Actively supported Jesse Jackson's presidential campaign in 1984.