The woman who was quite possibly your first movie crush, Margot Kidder has passed away at 69-years-old.

Margot Kidder, best known for playing Lois Lane in the 1978 "Superman" film passed away at her home Sunday at her home in Livingston, Montana.

The cause of death is currently unknown. We'll keep you posted as we get more information.

Kidder battled bipolar disorder in the 90s and was homeless for a while around that time.