Earlier this week, the Duchess of York made an appearance at both Safety Bay High School and Waikiki Primary School in Australia - and her dress was a major head-turner.
Sarah Ferguson, 65, was seen wearing a black polka dot dress as she read to a group of school children which featured a lovely white collar and pearls for buttons.
The classic polka dot number also featured long sleeves that cinched at the wrist and a floaty knee-length skirt.
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Princess Kate wore her designer dress when she visited Bletchley Park
Long-time royal style followers may have felt the look was familiar - and for good reason. The ultimate royal fashion icon the Princess of Wales owns an almost identical number and has worn it on several occasions.
Princess Kate's dress featured a beautiful collar
Prince William's wife, 42, was seen in 2019 during a visit to the 'D-Day: Interception, Intelligence, Invasion' exhibition at Bletchley Park wearing a gorgeous navy blue polka dot dress with an identical collar to Sarah's dress from earlier this week.
Kate's Alessandra Rich dress was teamed with mid-toned blue suede pumps and a Smythson black leather clutch.
A royal favourite
Pippa Middleton wore a pale blue iteration
Sarah and Kate are not the only stylish women wearing this look during a royal event.
Abigail Spencer wore Kate's dress to Prince Harry's wedding to Meghan Markle
Kate's younger sister Pippa Middleton wore a cornflower blue version to Prince Louis' christening in 2018 while the Duchess of Sussex's former Suits co-star Abigail Spencer wore the navy version to Harry and Meghan's royal wedding in 2018.
Royal style inspiration
Sarah was clearly inspired by Kate's Roland Mouret moment
It isn't the first time Prince Andrew's ex-wife has channeled the Princess of Wales.
Kate's look for the Top Gun Royal Film Performance was a classic
In July, the Duchess attended the Knights Of Charity Gala photocall at Chateau de la Croix des Gardes in Cannes in a slinky black gown with a white cape which was a doppelganger of Kate's Roland Mouret gown worn to the Royal Performance of Top Gun: Maverick in 2022.
Kate wore a caped look last November, inspiring Sarah
Meanwhile, in September Princess Beatrice's mother jetted to Sweden for the Perfect World Foundation's Honorary Conservation Award ceremony where she rocked a forest green caped gown.
The Princess of Wales wore a caped number by Safiyaa
DISCOVER: Princess Kate rocks cascading curls in unearthed university halls photo
Her dramatic look seemed to take cues from Kate's teal caped number by Safiyaa worn to The Royal Variety Performance last November.
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COMING UP...
- Kings who died in battle
- Princess Catherine's festive wardrobe
- Christmas at Windsor Castle