Brooke Shieldsis a modeling icon. At a young age,she walked the biggest cat walksand starred in some of the most famous campaigns, making a name for herself at just 12 years old. But despite her fame, the star says growing up in the spotlight wasn’t easy on her self-esteem. Now, at 52, Shields has partnered with body-positive swimsuit brandSwimsuits For Allfor it’slatest size-inclusive Power Suit campaign— and she’s opening up about why she’s more comfortable in a bikini now than she ever was in her twenties.

“Growing up under such scrutiny led me to feel insecure about my looks,” Shields tells PEOPLE in an interview about her new bikini ads. “Feeling disconnected from my own body, it took me years to separate the opinions of others from my own. Over time, I was able to find confidence in myself through my work, my passions, my network of strong female role models and my journey through motherhood. At 52 years old, I finally feel comfortable and proud of the all the hard work I’ve put into my body. I can say that I feel confident being in my own skin, showing my body and not hiding it.”

Courtesy Swimsuits For All

Shot10_Brooke_Undress_0189 (1)

And that comfort doesn’t come from crash dieting or insane workouts. Shields explains that she “didn’t do anything special” to prepare for the bikini shots. “It’s all about balance. There’s no set way to be healthy and fit, it really is finding what works for you. I always try to drink a lot of water, get a good night’s sleep and maintain a healthy and active lifestyle.”

And apparently, it’s paying off — as far as her self-esteem is concerned.

Swimsuits For All

Shot10_Brooke_Undress_0237

RELATED PHOTOS: Your Comprehensive Guide to Every Swimsuit the Kardashian-Jenners Have Worn Over the Years

“When I was younger, I never loved being in a swimsuit because I picked apart the way I looked in them. I would always find a way to cover up,” she shares. “Now, I feel most confident when I’m showing off my body rather than hiding it.”

Shields adds that her daughters, Rowan, 15 and Grier, 12, who she says raid her closet and teach her about Instagram, are a driving force behind her self-esteem today.

“My daughters have especially helped me feel confident and I am proud to be in more revealing swimsuits than before. I wore the stunning redPioneer Bikinifrom Swimsuits For All in this campaign that I felt so amazing in. It’ll be my go-to bikini all summer.”

Courtesy Swimsuits for All

012818_SFA_S18_JR_S 3_0473 (1)

RELATED VIDEO: Ashley Graham on Tyra Banks Returning to ‘America’s Next Top Model’: ‘She’s a Great Mentor’

Shields adds of her campaign co-stars: “Working on this campaign with Swimsuits For All was inspiring to me because each one of these women is remarkable. They all worked so hard through their own journeys to realize their self-confidence and their own voice, just like I have.”

So when it comes to taking the best bikini photos, what’s her secret? “It’s all about exuding your inner confidence. If you feel good on the inside, it will always show,” she shares.

source: people.com