Love the Duchess of Cambridge's Alessandra Rich dress? We've found a more affordable version from L.K.Bennett. (Getty Images)
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While The Duchess of Cambridge's royal wardrobe regularly causes a fashion frenzy, there's one midi dress that's particularly memorable when it comes to 'the Kate effect'.
Cast your mind back to 2018, when the 39-year-old royal wore the sell-out Alessandra Rich polka-dot shirt dress with a contrast collar, which retailed for £1,225, for Prince Charles' 70th birthday portrait.
She re-wore this look a year later when she visited an exhibition at Bletchley Park, England, to mark the 75th anniversary of the D-Day landings on 14 May 2019.
The elegant number was then replicated by numerous high street stores and sold out swiftly at every single one.
Buy it: Mathilde Navy & Cream Polka Dot Silk Tea Dress | £350 from L.K. Bennett
The Mathilde Navy & Cream Polka Dot Silk Tea Dress looks very similar to Kate's stylish number.
The tea dress has been created from 100% silk, in a navy blue and white polka-dot print, with a contrast cream collar.
It also features long sleeves, and a slight puff sleeve, crystal buttons down the front and a pleat detail to the bust, with a flattering tailored waist.
This style comes in UK dress sizes 6 to 18, all of which retail for £350.
The duchess is not the only fan of L.K.Bennett as Holly Willoughby and fellow presenter Amanda Holden also currently have a penchant for the brand, both wearing the label this week. Holden opted for a rather Duchess-inspired polka dot jumpsuit.
Or, for those wanting to buy into the Duchess' luxury look, Alessandra Rich has just bought out a new version of the memorable dress with short sleeves, which is currently available for £1,520 - but is already selling fast.
Alessandra Rich Pleated Polka-Dot Silk Midi Dress | £1,520 from Matches Fashion
8 other polka-dot designs we're loving from L.K. Bennett
Pleated Midi Dress | £125 (Was £250)
Spot Print Georgette Dress | £250
Print Silk Jumpsuit | £395
Ellen Navy Jumpsuit | £175
Devore Spot Shirt Dress | £395
Coral Polka Dot Dress | £325
Felix Navy and White Spot Pleated Dress | £125 (Was £250)
Ensor Shirt Dress | £112 (Was £225)
Watch: Yahoo! Style UK recreate the Duchess of Cambridge’s style transformation over the years