Oscar-nominated actress Sondra Locke, whose long on-screen and off-screen relationship with Clint Eastwood included starring with him in six movies, has died.

Locke died Nov. 3 at her home in Los Angeles of cardiac arrest related to breast and bone cancer, with news of her death going unreported until RadarOnline broke the story Thursday. The AP reported details after obtaining a copy of her death certificate.

Locke was nominated for an Academy Award for Best Supporting Actress for her first movie role, in the 1968 release “The Heart Is a Lonely Hunter.” The role also earned her two Golden Globe nominations, for Best Supporting Actress and Most Promising Newcomer, Female.

She later dated Eastwood for 13 years and starred with him in a string of movies starting with the Western “The Outlaw Josey Wales” in 1976 and continuing through the Dirty Harry movie “Sudden Impact” in 1983.

Locke and Eastwood’s on-screen collaborations included the 1978 movie “Every Which Way But Loose” and its sequel, “Any Which Way You Can,” released in 1980. Also in 1980, the couple starred in “Bronco Billy,” which earned Locke a nomination for a Razzie for Worst Actress.

Locke played the title role in the TV movie “Rosie: The Rosemary Clooney Story” in 1982 and directed and starred in “Ratboy” in 1986.

“In 1989, Locke’s charmed life came to an end as Eastwood broke up with her, she later wrote. The locks were changed and her things were placed outside a home she thought had been a gift from Eastwood,” the AP reports. “She sued Eastwood for palimony then later sued him for fraud saying a movie development deal he arranged for her was a sham to get her to drop the palimony suit. They settled the highly publicized lawsuit for an undisclosed amount during jury deliberations in 1996.”

She published her memoir, “The Good, the Bad and the Very Ugly: A Hollywood Journey,” in 1997, paying tribute to Eastwood’s epic 1966 spaghetti Western “The Good, the Bad and the Ugly” in the book’s title.