Demi Moore and Tallulah Belle Willis at the Los Angeles screening of "Killers" on June 01, 2010. Credit: Eric Charbonneau/Le Studio/

Even though Tallulah Willis has two hip older sisters (Rumer and Scout), the 18-year-old says that mom Demi Moore provides her with the most fashion inspiration.

In her recent shoot for, Tallulah dons a mixture of her own wardrobe, bought from stores like Topshop and Urban Outfitters, with jewelry and clothing belonging to her 49-year-old mother.

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"My mom has a warehouse of vintage clothes that she's collected," she tells the site. "Every time we go back to Idaho we grab a little bit more. It's like a treasure trove -- it's the best. It's like your own personal vintage store."

And though her mom, who was hospitalized January 23 after suffering a seizure, is Tallulah's style icon, that's not to say that her older sisters haven't had an influence on her too.

"I remember every day I would be like, 'Scout, dress me. Put an outfit on me,'" she recalls. "She wore all these vintage dresses. She'd dress me in these outfits and I would look ridiculous because they would be ten sizes too big, but I didn't care. From then on, dressing just became something I appreciated."

"I think the best feeling in the world is leaving the house absolutely feeling so good about what you're wearing," she continues. "It almost makes you feel like you have armor on."