Royal watchers who are eager to get their hands on Kate Middleton’s latest look are unfortunately out of luck.

The geometric-print Tory Burch dress that the Duchess of Cambridge wore to Prince George’s first official royal outing — an adorable playdate Down Under — has already sold out.

'The Kate effect' strikes again: Kate's Tory Burch dress has sold out. Photo: Getty

Just like the $40 Zara necklace before it, the black-and-white "Paulina" frock, which retails for $450, flew off the shelves after Kate was photographed sporting the stylish ensemble in New Zealand while on tour with Prince William and their eight-month-old son this week.

Kate's 36 best royal tour outfits

The short-sleeved number is elegant yet versatile for a busy mom on the go, which may explain why it proved popular among the masses.

Luckily, the monochromatic trend is hot for spring/summer, with a number of Canadian retailers carrying similar offerings (and at various price points).

See our Kate-inspired picks below.

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