Anyone who saw her 1978 film debut in Terrence Malick's Days of Heaven, knows the power and beauty that she added to that movie. And had her other films been as successful, more people might be aware of her talents.
In a recent interview in the Village Voice, she appears to have retired from the business and seems to have no interest in returning. That's a real shame, as her mere presence brings so much gritty realism to a project, opposed to the unrealistic looking Hollywood types that have taken over modern entertainment.
At least her films are still around. If you're not familiar with her work, I urge you to discover her. For starters take a look at Days of Heaven or Dennis Hopper's Out of the Blue and see for yourself the power, beauty and natural talent of Linda Manz.