Duchess Kate steps out in casual look for day of gardening

We all know that Duchess Kate is one thrifty royal, and she lived up to that claim on Wednesday when she stepped out in an oldie-but-goodie pair of riding boots -- her trusty Penelope Chilvers pair that she's had for over a decade!

The 35-year-old royal, who is pregnant with baby No. 3, visited Robin Hood Primary School to celebrate their work with the Royal Horticultural Society Campaign for School Gardening. For the outdoor occasion, Kate opted for dark denim, a black sweater underneath a Barbour jacket and her Penelope Chilvers boots. She flaunted a hint of her baby bump in the casual ensemble. 

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Duchess Kate visits Robin Hood Primary School
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Duchess Kate visits Robin Hood Primary School
LONDON, UNITED KINGDOM - NOVEMBER 29: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 24 HOURS AFTER CREATE DATE AND TIME) Catherine, Duchess of Cambridge visits the Robin Hood Primary School to celebrate ten years of The Royal Horticultural Society campaign for school gardening on November 29, 2017 in London, England. (Photo by Max Mumby/Indigo/Getty Images)
LONDON, UNITED KINGDOM - NOVEMBER 29: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 24 HOURS AFTER CREATE DATE AND TIME) Catherine, Duchess of Cambridge (boot detail) visits the Robin Hood Primary School to celebrate ten years of The Royal Horticultural Society campaign for school gardening on November 29, 2017 in London, England. (Photo by Max Mumby/Indigo/Getty Images)
LONDON, UNITED KINGDOM - NOVEMBER 29: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 24 HOURS AFTER CREATE DATE AND TIME) Catherine, Duchess of Cambridge visits the Robin Hood Primary School to celebrate ten years of The Royal Horticultural Society campaign for school gardening on November 29, 2017 in London, England. (Photo by Max Mumby/Indigo/Getty Images)
LONDON, UNITED KINGDOM - NOVEMBER 29: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 24 HOURS AFTER CREATE DATE AND TIME) Catherine, Duchess of Cambridge visits the Robin Hood Primary School to celebrate ten years of The Royal Horticultural Society campaign for school gardening on November 29, 2017 in London, England. (Photo by Max Mumby/Indigo/Getty Images)
LONDON, ENGLAND - NOVEMBER 29: Catherine, Duchess of Cambridge visits the Robin Hood Primary School to celebrate ten years of The Royal Horticultural Society campaign for school gardening on November 29, 2017 in London, England. (Photo by Eddie Mulholland - WPA Pool/Getty Images)
LONDON, UNITED KINGDOM - NOVEMBER 29: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 24 HOURS AFTER CREATE DATE AND TIME) Catherine, Duchess of Cambridge (boot detail) visits the Robin Hood Primary School to celebrate ten years of The Royal Horticultural Society campaign for school gardening on November 29, 2017 in London, England. (Photo by Max Mumby/Indigo/Getty Images)
LONDON, ENGLAND - NOVEMBER 29: Catherine, Duchess of Cambridge visits the Robin Hood Primary School to celebrate ten years of The Royal Horticultural Society campaign for school gardening on November 29, 2017 in London, England. (Photo by Eddie Mulholland - WPA Pool/Getty Images)
LONDON, ENGLAND - NOVEMBER 29: Catherine, Duchess of Cambridge visits the Robin Hood Primary School to celebrate ten years of The Royal Horticultural Society campaign for school gardening on November 29, 2017 in London, England. (Photo by Eddie Mulholland - WPA Pool/Getty Images)
LONDON, ENGLAND - NOVEMBER 29: A general view of an insect enclosure named 'Bug-ingham Palace' is seen during a visist by Catherine, Duchess of Cambridge to the Robin Hood Primary School to celebrate ten years of The Royal Horticultural Society campaign for school gardening on November 29, 2017 in London, England. (Photo by Eddie Mulholland - WPA Pool/Getty Images)
LONDON, ENGLAND - NOVEMBER 29: Catherine, Duchess of Cambridge visits the Robin Hood Primary School to celebrate ten years of The Royal Horticultural Society campaign for school gardening on November 29, 2017 in London, England. (Photo by Eddie Mulholland - WPA Pool/Getty Images)
LONDON, ENGLAND - NOVEMBER 29: School children welcome Catherine, Duchess of Cambridge to the Robin Hood Primary School to celebrate ten years of The Royal Horticultural Society campaign for school gardening on November 29, 2017 in London, England. (Photo by Eddie Mulholland - WPA Pool/Getty Images)
LONDON, ENGLAND - NOVEMBER 29: Catherine, Duchess of Cambridge visits the Robin Hood Primary School to celebrate ten years of The Royal Horticultural Society campaign for school gardening on November 29, 2017 in London, England. (Photo by Eddie Mulholland - WPA Pool/Getty Images)
LONDON, ENGLAND - NOVEMBER 29: Catherine, Duchess of Cambridge visits the Robin Hood Primary School to celebrate ten years of The Royal Horticultural Society campaign for school gardening on November 29, 2017 in London, England. (Photo by Eddie Mulholland - WPA Pool/Getty Images)
LONDON, ENGLAND - NOVEMBER 29: Catherine, Duchess of Cambridge visits the Robin Hood Primary School to celebrate ten years of The Royal Horticultural Society campaign for school gardening on November 29, 2017 in London, England. (Photo by Eddie Mulholland - WPA Pool/Getty Images)
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The first time Kate was spotted in those boots was during the early stages of her relationship with Prince William. She was first seen in the long tassel boots at the Game Fair at Blenheim Palace in August 2004, and has worn them countless of times ever since.

Photographs of the mother to Prince George and Princess Charlotte show her interacting with the young students. The Duchess began laughing after she learned that one of the outdoor areas was named "Bug-ingham Palace" in a nod to the royal residence. Kate also put on a pair of gloves as she joined students who were tending the garden.

The outing comes after a whirlwind week for the royal family following the announcement of Prince Harry's engagement to actress Meghan Markle.

RELATED: Duchess Kate dazzles in ice-blue gown:

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Duchess Kate at the Royal Variety Performance
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Duchess Kate at the Royal Variety Performance
LONDON, UNITED KINGDOM - NOVEMBER 24: Catherine, Duchess of Cambridge is seen backstage at the Royal Variety Performance at the Palladium Theatre on November November 24, 2017 in London, England. The Royal Variety Performance takes place every year, either in London or in a theatre around the United Kingdom. The event is in aid of the Royal Variety Charity, formally, The Entertainment Artistes Benevolent Fund, of which The Queen is Patron. The money raised from the show helps hundreds of entertainers throughout the UK, who need help and assistance as a result of old age, ill-health, or hard times. (Photo by of Eddie Mulholland - WPA Pool/Getty Images)
LONDON, UNITED KINGDOM - NOVEMBER 24: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 24 HOURS AFTER CREATE DATE AND TIME) Catherine, Duchess of Cambridge departs after attending the Royal Variety Performance at the Palladium Theatre on November 24, 2017 in London, England. (Photo by Max Mumby/Indigo/Getty Images)
Britain's Catherine, Duchess of Cambridge meets performers after the Royal Variety Performance at the Palladium Theatre in central London on November 24, 2017. / AFP PHOTO / POOL / Eddie MULHOLLAND (Photo credit should read EDDIE MULHOLLAND/AFP/Getty Images)
LONDON, ENGLAND - NOVEMBER 24: Catherine, Duchess of Cambridge, shoe detail, attends the Royal Variety Performance at the Palladium Theatre on November 24, 2017 in London, England. (Photo by Karwai Tang/WireImage)
Britain's Catherine, Duchess of Cambridge meets performers after the Royal Variety Performance at the Palladium Theatre in central London on November 24, 2017. / AFP PHOTO / POOL / Eddie MULHOLLAND (Photo credit should read EDDIE MULHOLLAND/AFP/Getty Images)
LONDON, ENGLAND - NOVEMBER 24: Catherine, Duchess of Cambridge attends the Royal Variety Performance at the Palladium Theatre on November 24, 2017 in London, England. (Photo by Karwai Tang/WireImage)
LONDON, ENGLAND - NOVEMBER 24: Catherine, Duchess of Cambridge attends the Royal Variety Performance at the Palladium Theatre on November 24, 2017 in London, England. (Photo by Karwai Tang/WireImage)
LONDON, ENGLAND - NOVEMBER 24: Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge attend the Royal Variety Performance at the Palladium Theatre on November 24, 2017 in London, England. (Photo by Karwai Tang/WireImage)
Britain's Catherine, Duchess of Cambridge meets performers after the Royal Variety Performance at the Palladium Theatre in central London on November 24, 2017. / AFP PHOTO / POOL / Eddie MULHOLLAND (Photo credit should read EDDIE MULHOLLAND/AFP/Getty Images)
LONDON, UNITED KINGDOM - NOVEMBER 24: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 24 HOURS AFTER CREATE DATE AND TIME) Catherine, Duchess of Cambridge departs after attending the Royal Variety Performance at the Palladium Theatre on November 24, 2017 in London, England. (Photo by Max Mumby/Indigo/Getty Images)
LONDON, ENGLAND - NOVEMBER 24: Catherine, Duchess of Cambridge, shoe detail, attends the Royal Variety Performance at the Palladium Theatre on November 24, 2017 in London, England. (Photo by Karwai Tang/WireImage)
LONDON, UNITED KINGDOM - NOVEMBER 24: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 24 HOURS AFTER CREATE DATE AND TIME) Catherine, Duchess of Cambridge (posy detail) departs after attending the Royal Variety Performance at the Palladium Theatre on November 24, 2017 in London, England. (Photo by Max Mumby/Indigo/Getty Images)
LONDON, ENGLAND - NOVEMBER 24: Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge attend the Royal Variety Performance at Palladium Theatre on November 24, 2017 in London, England. (Photo by Ricky Vigil M/GC Images)
LONDON, ENGLAND - NOVEMBER 24: Catherine, Duchess of Cambridge attends the Royal Variety Performance at Palladium Theatre on November 24, 2017 in London, England. (Photo by Ricky Vigil/GC Images)
LONDON, ENGLAND - NOVEMBER 24: Catherine, Duchess of Cambridge attends the Royal Variety Performance at Palladium Theatre on November 24, 2017 in London, England. (Photo by Ricky Vigil/GC Images)
LONDON, ENGLAND - NOVEMBER 24: Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge attend the Royal Variety Performance at Palladium Theatre on November 24, 2017 in London, England. (Photo by Ricky Vigil/GC Images)
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"William and I are absolutely thrilled. It's such exciting news," Kate said of Harry and Meghan's engagement. "It's a really happy time for any couple and we wish them all the best and hope they enjoy this happy moment."

For more on the royal family, watch the video above. 

 

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