Diane Keaton was known not only for her iconic role in The Godfather series as Annie Hall, but was also respected in the fashion world for her distinct style. She was known for her "quirky" fashion, which was an adjective often used to describe the outfits that she wore to the red carpet.Some staple pieces that Keaton was often seen wearing include turtle necks, belts, bowler hats, berets, statement shoes, scarves, gloves, and more. She was also known for adopting the androgynous style and making it her own.However, in a recent exclusive by Radar Online, friends of the late Morning Glory star revealed the alleged reason behind her style. The source said:"Diane was incredibly stylish, but those clothes were also her protection... She was never fully comfortable showing her body. She carried a lot of insecurity about what she called her 'flaws,' and after what she went through with skin cancer, covering up just became her way of feeling safe. Her look wasn't vanity – it was survival."What did Diane Keaton say about her style?During an interview with the Los Angeles Times in 2019, Diane Keaton, who was 73 years old at the time, said while discussing her style, specifically the reason why she always covered her head and neck.She said:"I know what I am by now."She also told InStyle during an interview in the same year:"Yes, it's very protective. It hides a multitude of sins. Flaws, anxiety – things like that. I would not feel comfortable in a short skirt or something cut off with my arms hanging out there... And I've always liked hats. They just frame a head. But, of course, nobody really thinks they're as great as I do."Additionally, Keaton's battle with skin cancer was not the only reason she dressed the way she did. Diane Keaton also spoke about her eating disorder, which she developed during her 20s.Keaton opened up, saying:"All I did was feed my hunger, and I am an addict... It's true. I'm an addict in recovery; I'll always be an addict... I don't think it gets easier as you get older... I think it gets more pressing, just because it's really about death. It's really like approaching it, and how do you approach that part of your life? Nobody wants that."Diane Keaton talked about cancer in her familyDiane Keaton was only 21 years old when she was diagnosed with basal cell carcinoma. She had to go through two surgeries for squamous cell cancer. She also revealed that the diagnosis was not easy. It took three biopsies to finally confirm that she had cancer.Keaton said:"I had it for a very, very long time before it was diagnosed. I knew something was up, but no one could find it. I had three biopsies before they found it. And it was deep."During an interview in 2015, Diane Keaton revealed that when she found out she had cancer, her family was shattered by the news. She also spoke about the history of cancer in her family, saying:"I remember my Auntie Martha had skin cancer so bad they removed her nose. My father had basal skin cancer, and my brother had it."Furthermore, Keaton's advice to the public is to wear sunscreen all the time. In her words:"Wear sunscreen. You've got to put it on... I might have avoided 20 skin cancers had I been a constant sunscreen wearer and taken the matter seriously."Diane Keaton's signature style was more than just a fashion statement. It was a form of protection and self-expression. Behind her love for hats, turtlenecks, and androgynous looks was a deep sense of vulnerability shaped by her insecurities, health struggles, and skin cancer battle. Nonetheless, her fashion sense and acting skills have shaped her into a Hollywood icon who will forever be remembered.