Alexi Lubomirski/Harper's BAZAAR

She may be a movie star with a rock star fiance and homes in Los Angeles and London, but Kate Hudson admits that even she can't afford the designer dresses she wears on the runway and on magazine covers.

"People think we own all these dresses, but we borrow them!" the 34-year-old actress told the December issue of Harper's Bazaar. "I can't afford to buy that stuff. There are certain things I splurge on, but it's very rare, especially when you have two kids and school tuition."

"I'm not a big high-end fashion shopper," Hudson said. "I wish I could, but the truth is things are just so expensive. Before Isabel Marant was a million dollars and famous, I used to go to her store in Paris and go crazy. It was so affordable."

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Even if she could afford it, Hudson is no material girl, thanks to her upbringing by mother Goldie Hawn and Hawn's longtime partner, Kurt Russell.

"My mom wasn't a big shopper for us," Hudson told Harper's. "I think they wanted to instill that in us even though we grew up in a really privileged and lucky lifestyle."

Now, Hudson is passing along the same kind of pragmatism to sons Bing, 2, and Ryder, 9.

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"I see his friends texting people, and I just can't do it," Hudson said about buying Ryder, her son with ex-husband Chris Robinson, his first cell phone. "The first device I got was a pager! I was 13, and it was hot pink."

In addition to being a mother, acting on the big and small screens, and planning her wedding to Muse frontman Matthew Bellamy, Hudson is contemplating her own eponymous brand - reasonably priced, of course.