Actress Margot Kidder, best known for playing Lois Lane in the Superman films in the 1970s and 1980s, has died at the age of 69, a funeral home in Montana said on Monday.
           
Reuters reports that The Franzen-Davis Funeral Home in Livingston, Montana said on its website that Kidder passed away on Sunday at her home in the town. The cause of death was not immediately known.

Kidder with her Superman co-star Christopher Reeve 

Kidder rose to fame as Lois Lane in 1978's Superman, and followed that massive success with Superman II  in 1980, Superman III in 1983 and Superman IV: The Quest for Peace in 1987.

Canadian-born Kidder also appeared in the movie The Great Waldo Pepper and the children's TV series R.L. Stine's The Haunting Hour.

An obituary has been posted online, confirming the news that the actress died on Sunday, May 13.

It reads: "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."

She is survived by daughter Maggie McGuane.

According to IMDB, Kidder had two projects in pre-production at the time of her passing. She last appeared in 2017's The Neighborhood.

Tributes have flooded in for the legendary actress after news of her passing broke.

Posting on Twitter, Margot’s Superman co-star Sarah Douglas remembered their time together on set.

She wrote: "So saddened by the news that dear #MargotKidder has died peacefully in her sleep yesterday.

"We continued to have fun together over the last 40 years and she was a joy to be around."

Smallville producer Mark Millar wrote,  "My Lois Lane has passed away," he said. "RIP Margot Kidder. Thank you for my favourite movie ever."

Film producer Jonathan Sothcott credited Kidder for being the "heart of a great franchise and a fine actress."