'Superman' star has passed away aged 69

The woman who once played Superman’s love interest has passed away. Margot Kidder was found dead in her home after being found unconscious.

TMZ reported that she passed away on May 13, 2018. Her cause of death is currently unknown and the police are investigating.

Margot Kidder was famous for being the actress who played Lois Lane in Superman. She passed away this weekend in Livingston, Montana at the age of 69 according to Closer Weekly.

The Park County Attorney, Bruce Becker, reported that an unknown person had called the police to report that Kidder was unconscious and not breathing. When the police responded they found her dead.

The Livingston Police Chief said that foul play was not considered a factor, but that her death was under investigation. Arrangements for her funeral are under the care of Franzen-Davis Funeral Home and Crematory in Livingston, MT.

Kidder started off her acting career in the 1960s but only rose to fame in 1978. That was the year she starred alongside Christopher Reeve in Superman: The Movie.

She also reprised her Lois Lane role in the movie's three sequels. Her other acting credits include Captain Planet and the Planeteers, Shell Game, Phantom 2040, Nichols, Boston Common, The Amityville Horror, Heartaches, and Black Christmas.

‘Margaret Ruth 'Margot' Kidder, 69, of Livingston, MT. The actress and activist passed away on Sunday, May 13, 2018 at her home.’

Franzen-Davis Funeral Home and Crematory, May 13, 2018

In 1996, her career took a turn for the worse when she suffered a mental breakdown due to her battle with bipolar disorder. "The woman we saw was in obvious mental distress," Officer Rick Young of the Glendale police told People after she had gone missing for days.

Young shared that the actress thought a whole group of people were after her. During her struggle, she was briefly homeless in the same year.

Kidder revealed to People soon after that she was battling manic depression and suffering "mood swings that could knock over a building." She admitted that it was very hard to convince a manic person that there was something wrong with them.

The star revealed that she had no desire to sleep and was full of ideas. She became an advocate for mental health after that incident and it’s unclear if her passing was related to her mental health.

After the episode, which was over 22 years ago, her career was rekindled with roles in shows including Smallville, Law & Order: SVU, and more. The actress continued acting right up until this year.

She took small roles in TV shows and movies but she also had stage roles which included The Vagina Monologues on Broadway. Reports stated that she had 2 more roles that were yet to be released.

Kidder had been married 3 times in her life but she had been single since the '80s. She is survived by her daughter Maggie McGuane.