Margot Kidder was most famously known as Lois Lane in the Christopher Reeves “Superman” series but she once filmed in an Irish-American movie in Dublin.

“Superman” actress Margot Kidder passed away on Monday aged 69. While the cause of her death is yet unknown, she is believed to have died in her home in Montana.

“An unknown person called police to report Margot was unconscious and not breathing,” Bruce Becker, the Park County Attorney told TMZ.

“Police responded and found her dead. The death is now under investigation.”  

An obituary has also been posted online confirming the news: "Margaret Ruth 'Margot' Kidder, 69, of Livingston, Montana. The actress and activist passed away on Sunday, May 13th, 2018 at her home. Arrangements are pending under the care of Franzen-Davis Funeral Home and Crematory in Livingston, MT."

Although Kidder found fame as Lois Lane staring opposite Christopher Reeves in 1978's "Superman," and also in the 3 sequels, she also shot a movie in Ireland alongside Gene Wilder.

In the Irish-American comedy “Quackser Fortune Has a Cousin in the Bronx,” eight years before taking on the Lois Lane role, Kidder played an exchange student in Ireland who becomes the love interest of a poor horse manure collector in Dublin whom she almost runs over with her car.

Read more: Best Irish movies of all time we feel more than deserved an Oscar

You can see Kidder roaming Dublin in the clip below:

It was after returning from filming in Dublin that Kidder relocated to New York City to further study acting.

What was your favorite Kidder role? Let us know in the comments section below.

Margot Kidder in a publicity photo for "Quackser Has a Cousin in the Bronx" (1970) filmed in Dublin.WikiCommons