Amanda Peet is 'doing great' following cancer diagnosis After recently revealing she was diagnosed with breast cancer last year, Amanda Peet says she is "doing great" now. 1 April 2026 Amanda Peet is doing "great" following her treatment for breast cancer. Amanda Peet was diagnosed with breast cancer last year The Your Friends and Neighbors actress revealed in March she had been diagnosed with the disease last year but after having the tumour removed and undergoing radiotherapy, she is now feeling much better. During an appearance on Watch What Happens Live with Andy Cohen on Tuesday (31.04.