Shelley Duvall, the intrepid, Texas-born movie star whose wide-eyed, winsome presence was a mainstay in the films of Robert Altman and who co-starred in Stanley Kubrick’s The Shining, has died. She was 75.

Duvall died Thursday in her sleep at home in Blanco, Texas, her longtime partner, Dan Gilroy, announced. The cause was complications from diabetes, said her friend, the publicist Gary Springer.