The death of Superman actress Margot Kidder has been declared suicide by drug overdose.
The actress was found dead at her home in Montana in May at the age of 69.
His coroner revealed on Wednesday that his death was the result of a "self-inflicted drug and alcohol overdose."
It has not been revealed what drugs he took.
Margot had previously fought against bipolar disorder, which causes a person to have extremely elevated mood swings, for many years and has been open to the public about their problems.
In 1996, her fight against the disorder became so intense that she was temporarily homeless after a collapse that led to her disappearance for four days.
She was found shortly after in the backyard of a homeowner and was taken by the Los Angeles Police Department to Olive View Medical Center in a manic state.
Days after the event, she was placed in a psychiatric care center.
Albert L. Ortega / Getty Images
Harry Langdon / Getty Images
In her later life, she became an advocate for mental health.
In a joint statement, Margot's family and the Park County coroner's office said they are urging "those suffering from mental illness, addictions and / or suicidal thoughts to seek appropriate counseling and treatment."
The actress was best known for her role as Lois Lane in four of the Superman films during the 70s and 80s, in which she starred opposite the late Christopher Reeve.
He also appeared in The Great Waldo Pepper with Robert Redford in 1975 and The Amityville Horror in 1979, as well as in several episodes of Law & Order: Special Victims Unit and Smallville.
Ron Galella / WireImage
Robin Platzer / FilmMagic
Margot was married three times, with the American novelist Thomas McGuane, the actor John Heard, whom he married in 1979 but separated from him six days later, and the French film director Philippe de Broca from 1983 to 1984.
He is survived by his daughter Maggie, 41, whom she shared with her first husband.
For confidential assistance, call the Samaritans in the United Kingdom at 116 123 or visit a local Samaritans branch.