Kate Middleton broke her own tradition with her Wimbledon final dress.

After Kate Middleton’s unexpected shorter hairdo “reveal” last week at Wimbledon, more eyes than ever were on the royal as she attended the tennis tournament’s final yesterday.

And yes, as much as she’s highly regarded for her fantastic charity work, many people were equally as passionate to see what she’d be wearing to the event, which saw Roger Federer take victory.

When it comes to Wimbledon, the Duchess of Cambridge has a pattern of what’s become a winning formula. Her secret? Doing the very normal – but actually very rare for those in the public eye – practice of wearing an outfit more than once.

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Groundbreaking, we know.

According to dedicated fashion account Kate’s Closet, since 2012 Kate Middleton has opted to wear dresses to Wimbledon that she has previously worn on royal tours.

Since 2012, Kate has recycled a dress for #Wimbledon that she has previously worn on royal tour, so I have my money on the green D&G frock!

— Kate’s Closet (@katesclosetau) July 16, 2017

Diehard fans were speculating which outfit would make a return in 2017, with her emerald green Dolce and Gabbana number from the royal visit to Canada last year proving a popular prediction.

However this year she broke her own tradition - and seemingly the internet when people struggled to identify where her chosen never-before-seen-or-worn dress was from.

No recycle for #DuchessKate today as she arrives at #Wimbledon in a new summer dress: pic.twitter.com/t24KCVBOwq

— HRH Kate Middleton (@HRHKateBlog) July 16, 2017

New on blog. #PrincessKate was radiant today at #Wimbledon. The hunt for her dress gave the rest of us grey hair. https://t.co/gMhkTKqUiU pic.twitter.com/T3bWGjxckT

— HRH Kate Middleton (@HRHKateBlog) July 17, 2017

After many hours of investigation from style lovers that would make Sherlock Holmes look incompetent, her white (very on tennis brand!), high-necked, short-sleeved, A-line summer dress with floral designs on the skirt was identified as most likely by British couture house Catherine Walker and Co.

Instagram user ParkysGirl79 found a very similar dress from the brand from a previous collection that featured the same wildflower print.

#KateMiddleton wears white wildflower print dress to #Wimbledon final https://t.co/pzzqJ1BHUd pic.twitter.com/ABwdbCiGNv

— Kate Middleton Style (@KateMiddStyle) July 16, 2017

While the dress does not look like it's currently available, a scarf featuring the same print is, for around $500.

Middleton has worn Catherine Walker previously, wearing a grey coat from the brand for a St Patrick's Day event in 2015.

If you're after a similar dress, Ted Baker's Yvetta Fit & Flare Dress, $306.67, looks to be your best bet.

This year marks the Duchess of Cambridge's first as patron of the All England Lawn Tennis Club, which she took over from the Queen earlier this year as she looked to reduce her workload.

This explains the green and purple bow pinned on to her dress, a pin given to all members of the All England Lawn Tennis and Croquet Club.

Given the Kate Middleton effect - whereby everything she wears sells out immediately, you can bet if the dress is still on sale anywhere, it won't be for long.