Amanda Peet has spoken openly about her cancer battle after revealing her diagnosis in March. In an essay for The New Yorker, Peet shared that she learned she had stage I cancer that was "hormone-receptor-positive" and "HER2-negative" after undergoing a routine scan. According to the Mayo Clinic, this is the most common type of breast cancer. "I was happier than I'd been pre-diagnosis, when I was just a regular person who didn't have cancer," Peet wrote. "But after about 10 minutes, I remembered that I still needed the MRI and regressed to baseline terror. [My doctor,] Dr. K.