Michelle Monaghan is getting candid about her battle with a serious form of skin cancer. Monaghan, 49, exclusively opened up to Us Weekly about being diagnosed with melanoma, after not being aware of the severity of skin cancer, and why SPF is so important to her now more than ever. "I was diagnosed with melanoma several years ago, and it was something that really shocked me. I didn't know anything about skin cancer," the White Lotus alum told Us. "For anybody out there, please do not go to the tanning bed. You're five times more likely to get melanoma.