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In a candid essay titled “My Season of Ativan,” published in The New Yorker on March 21, 2026, the 54-year-old actress shared how her diagnosis came in late 2025—just as both of her parents were in hospice care on opposite coasts.
A Routine Check That Changed Everything
Peet explained that she had long been closely monitored due to having “dense” breast tissue. During a routine ultrasound in August 2025, her doctor identified a suspicious area that led to an immediate biopsy.
The diagnosis: hormone-receptor-positive, HER2-negative breast cancer—a form considered highly treatable. Her doctor even described it using an unusual comparison, calling it more like a “poodle” than a “pit bull,” to emphasize its less aggressive nature.
Although a second mass was initially discovered and raised concerns, it was later confirmed to be benign.
Treatment and Recovery
Peet underwent a lumpectomy followed by radiation therapy. She was able to avoid more aggressive treatments such as chemotherapy or a double mastectomy.
By early 2026, she received a “clear scan,” marking a major milestone in her recovery.
Personal Loss Amid Health Battle
While navigating her diagnosis and treatment, Peet also faced heartbreaking losses within her family.
Her father passed away shortly after her biopsy; she arrived in New York just moments after his death. Soon after, her mother—who had been battling Parkinson’s disease—passed away in January 2026, only weeks after Peet’s first clear scan.
The overlapping grief and medical challenges made the period especially intense and emotionally complex.
Family First
Peet, who is married to David Benioff, co-creator of Game of Thrones, said the couple chose to wait until her prognosis was clear before telling their children—Frances (19), Molly (15), and Henry (11).
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