Catherine, Duchess of Cambridge, Kate Middleton

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Hold on to your fascinators—Kate Middleton is having a twofer kind of day!

After stunning us this morning in a nautical Jaeger dress—which has already sold out—the Duchess of Cambridge decided to pull a quick change before attending the Duke of Edinburgh's 93rd birthday celebration.

For her second outing of the day, Prince William's wife stepped out in a beige frock by her favorite designer Alexander McQueen, topped with a festive bow-adorned fascinator. Catherine previously wore the lace sheath with a belt and a slightly different hat to the Queen's Diamond Jubilee lunch in 2013. Apparently this is her go-to party dress. Prince George's mum accessorized her neutral look with simple pearl earrings, nude pumps and matching clutch.

Catherine, Duchess of Cambridge, Kate Middleton

Chris Jackson/Getty Images

Like the National Maritime Museum event earlier in the day, Kate was flying solo for Prince Philip's garden soiree—no William and no George. However, the Duchess was surrounded by plenty of family including Queen Elizbaeth II and Princess Eugenie.

What do you think of Kate's second look of the day?

PHOTOS: Kate Middleton's recycled looks

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