I was on Tiktok and I found out that Maggie Smith (Professor McGonagall) survived cancer- I googled it and it's true. Here's what I found-
"Smith, who is now starring in “Downton Abbey,” is known and loved for her role as Professor McGonagall in Harry Potter. Smith is a cancer survivor, too; in 2007, she was diagnosed with breast cancer, and she continued to film “Harry Potter and the Half Blod Prince” even as she underwent chemotherapy."
Maybe y'all knew this but I didn't- wow.