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Kate Middleton, Prince William

Mario Testino/Clarence House Press Office via Getty Images

Now that the oohing and aahing over Prince William and Kate Middleton's gorgeous royal engagement photos has subsided, the burning question is: Where did Kate get her dress?!

First of all, the princess-to-be set an example for budget fashionistas everywhere and shopped her own closet.

For the formal portrait, William's betrothed wore a white, long-sleeve Reiss fall 2009 dress that retailed for less than $300, and she chose a vintage-inspired silk blouse from Whistles' fall 2008 line for the casual close-up.

Bummer that these styles are no longer in stores, but there's hope...

Both British brands have decided to reissue the pieces next year!

"We are delighted that Katherine has chosen to wear Whistles in her engagement photographs," Jane Shepherdson, CEO of Whistles, said in a statement. "Due to a surge of customer interest we will be rereleasing the 'Kate' blouse as a limited edition in early 2011."

And Reiss also followed suit, announcing today that it will begin reselling the "Nanette" dress in January 2011.

Forget the commemorative Wills and Kate mugs, tea towels and stamps—we're holding out for Kate's couture!