learned she had breast 'last fall' after a 'routine scan' showed unusual changes.
In an essay published in The New Yorker on Saturday, the 54-year-old Something's Gotta Give star went into detail about her experience from diagnosis to treatment.
'For many years, I've been told that I have 'dense' and 'busy' breasts - not as a compliment but as a warning that they require extra monitoring,' Peet wrote.
'I had been seeing a breast surgeon every six months for checkups. The Friday before Labor Day, I went for what I thought would be a routine scan.'
She added that her doctor 'didn't like the way something looked on the ultrasound,' and ordered that a biopsy be done.
Peet, whose Your Friends & Neighbors co-star in 2024, had a premonition something was wrong judging by her physician's next response.
Amanda Peet has spoken out about her breast cancer diagnosis in an essay published in The New Yorker on Saturday (pictured in May 2025)
The 54-year-old actress learned she had breast cancer 'last fall' after a 'routine scan' showed unusual changes (pictured in October 2025)
'After the procedure, she said that she would walk the sample over to Cedars-Sinai and hand-deliver it to Pathology. That's when I knew,' Peet said.
Her doctor shared the results with her the next day. 'The tumor 'appeared' to be small, but I would need an MRI after the holiday weekend to determine 'the extent of disease.''
In the meantime, Peet was facing another heartache as both of her parents were in hospice care.
Peet's best friend Sarah Paulson commended the star for her 'gorgeous essay' on Saturday (Peet was pictured supporting Paulson at her All's Fair premiere in October 2025)
Other celebrities flocked to the comments section to echo that sentiment.
