Multi-Hyphenate Superstar Demi Moore Is Getting Ready To Mark Her 60!

The actress, Demi Moore, 59, has made her mark. She's shaved her head, mastered a one-arm push-up, fought for pay equity in Hollywood, and bared her soul in a bestselling memoir.

She's taking on a new challenge as she gears up to celebrate her 60th birthday in November: designing a collection for the inclusive swimwear brand Andie and modeling her creations (bikinis included!) for the campaign.

For the multi-hyphenate superstar, the Demi Moore x Andie capsule is about, well, more than a great-fitting bikini; it's about breaking old rules of what women should and shouldn't wear after a certain age.

Demi Moore said, "It's changing this idea that women become less desirable as we get older," adding, "We don't want to look matronly or not feel sexy."

For the General Hospital star, embracing her age has been "liberating." While speaking about what she looks forward to most about turning 60 later this year, she tells PEOPLE, "Not being defined by a number and instead being defined by my experience." She added, "You hit 59 and you're already thinking, 'Well, I'm going to be 60.'

Related: Demi Moore making love relations with Daniel Humm

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It feels very liberating. When I think of my grandmother at 60, she in a way deemed to be already resigned to being old. But I feel, in so many ways, more alive and present than ever."

As her 40-year career acting continues to endure, Moore says she still can't get used to hearing her name and the word "icon" in the same sentence.

Currently shooting a film in Europe, Moore says, "To hear that about yourself seems a bit out-of-body. I feel flattered and a bit like, that doesn't feel like me, but I like it."

The 59-year-old continued, "To me, what an icon has always signified is somebody who's paved a way and marked something that has moved people or had an impact that has been positive.

And in that regard, I feel really proud to be put in a category that would be related to that." Regarding her style sense, the movie star admits, "I do appreciate fashion, and I have a relationship with designers I respect and admire."

Moore admitted, "But I still feel like a little kid who gets to dress up and who I am at heart is a grubby 12-year-old boy who really likes to just be comfortable and wear baggy clothes.

" While at her Idaho home during the pandemic with her blended family, daughters Scout, 31, Rumer, 33, and Tallulah, 28, plus her ex Bruce Willis, 67, and his wife Emma Heming Willis, 46, and kids Evelyn, 8, and Mabel, 10, Moore spent most of her time in overalls.

Related: Heming and Bruce Willis run errands three months after Bruce Willis revealed his diagnosis of aphasia

Moore tells PEOPLE, "When I'm in Idaho, it's generally overalls all day, every day," adding, "That's as much me as wearing a super-gorgeous red carpet gown or a chic designer outfit front row at fashion week." Moore also turns to her three girls for dressing tips and beyond, citing them as her "biggest teachers."

She says, "It is a mutual exchange of style inspiration," adding, "When they're being themselves, that's the most inspiring for me. I saw my youngest daughter wearing this vintage Japanese silk robe out, and I looked at it and said, "Is that from my storage?" And she said, "Yes, I liberated it.

"In the end, it's going to all go to them anyway, so why not let them dip in?"