Martha Stewart: The Ultimate Beauty Icon at 83

At 83, the lifestyle mogul, businesswoman, and queen of reinvention is turning heads as the newest face of MAC Cosmetics. Starring in their latest campaign, "I Only Wear MAC," Stewart leans into the brand’s signature nude shades with one of her now-iconic thirst trap photos.

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Stewart herself is all for the sultry-yet-classic campaign. “The photos are charming, and I think they'll get some attention,” she tells PEOPLE exclusively. “I love what I look like in these pictures. They’re almost selfie-like. This fabulous nude color lipstick really makes the face. It's a beautiful colour.”

While Stewart is thrilled with her glam new gig, she hasn’t shared the news with her daughter, Alexis, or her 13-year-old granddaughter, Jude, just yet. “I think she would be shocked,” Stewart laughs. “Grandma looking like this!” But she has no doubt Jude will love it—especially since she’s already a budding beauty aficionado. “She knows the ingredients in every single product. If you could see her makeup table!”

But this campaign is about more than just makeup. MAC is celebrating confidence and authenticity—two things Stewart has never been short on. “It’s no good running around feeling unsure of oneself,” she says. “I constantly try to get people to just step up, feel good, and be proud of the result.” And if her latest campaign is any proof, confidence is truly ageless.

Let's all take a page from Martha—because confidence looks good at any age.