(Exclusive) Diane Keaton Pokes Fun at Her Love of Headwear with a Larger-Than-Life-Sized Hat Diane Keaton's Daughter Dexter Pens Heartfelt Mother's Day Message: 'Thank You for Everything' Diane ...

Diane Keaton is known for her iconic masculine style but, as the actor acknowledged, there's a practical reason for covering up too. And a dermatologist agrees.