August 2, 2022 | 3:54pm

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When it comes to dresses, there’s one pattern that makes the duchess goes dotty.

Kate Middleton has been seen time and time again in polka-dot dresses, from classic versions in black and navy to bolder pink and green versions.

This year alone, we’ve seen the Duchess of Cambridge step out in a white spotted frock at Royal Ascot, pick a black polka-dot dress for Prince Philip’s memorial service and sport not one, but two different dotted dresses at Wimbledon.

She’s even passed her love of polka dots down to daughter Princess Charlotte, who rocked a navy top with white spots for a sweet video message cheering on England’s women’s soccer team this week.

Princess Diana was a big fan of the classic pattern, too; in fact, Middleton’s 2022 Royal Ascot look was strikingly similar to a spotted dress Diana wore to the same event in the 1980s.

Kate MiddletonThe duchess wore a dotted peplum look by Alessandra Rich to Wimbledon this year.WireImage

If you’re looking to “replikate” the Duchess of Cambridge’s style, we’ve rounded up a few of the best polka-dot dresses worthy of any royal — but with slightly lower price tags than Kate’s favorite four-figure Alessandra Rich creations.

Reformation Hilltop Dress ($260)

Polka dot dressFarfetch

This slightly-puffed sleeve, midi-length style has a very royal silhouette — perfect for those in-office meetings this summer, or perhaps a day at the races.

Floerns V-Neck Polka Dot Puff Sleeve Dress ($33)

green polka dot dressAmazon

For a budget-friendly version of Middleton’s favorite midis, look no further than this Amazon find. Along with its unbeatable price, it’s available in five different colors as well as a long-sleeved version.

L.K. Bennett Mathilde Silk Tea Dress ($680)

polka dot dressLK Bennett

The Duchess of Cambridge loves an L.K. Bennett look, and this collared frock with crystal buttons is quite similar to an Alessandra Rich style she owns. Britney Spears has shown off this dress on her Instagram, too, so it’s definitely a celeb-approved pick.

Afrm Jamie Dress ($45, originally $138)

coral dressNordstrom Rack

If you’re looking for the fashion equivalent of a mullet — business in the front, party in the back — this coral number ticks all the boxes. The fluttering sleeves and midi length are very Kate, but the cutout back and slit skirt add sass for a summer wedding or date night.

Boden Lavinia Jersey Wrap Dress ($75, originally $150)

polka dot dressBoden

For an everyday look, this easy jersey dress from Boden will take you from farmer’s market to brunch to a bridal shower. Throw on a denim jacket, and you have the perfect transitional piece for the cooler fall days ahead.