Kate's quick change: Duchess is captivating in cocktail attire for reception after charming kids earlier in the day

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The Duchess of Cambridgestepped out for an embargoed event earlier today -- kept under wraps until she was on her way home -- and then had a quick change for a more formal evening reception. Both of today's engagements were in support of Place 2 Be, one of Kate's chosen charities, and she spent the day charming children left and right.

Kate first stepped out at the Natural History Museum in London in L.K. Bennett, wearing the Cersei Evergreen Silk Dress (ummm, tribute to Game of Thrones, Kate?!) and paired the look with a new pair of snakeskin pumps. The classic silk dress retails for £375.00, about $465, and is still available in most sizes.

She wore her hair down in that bouncy blowout we all know and love. (And try desperately to recreate.)

See both of Kate's gorgeous looks in the gallery:

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Duchess of Cambridge does a quick change for two official engagements
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Duchess of Cambridge does a quick change for two official engagements
The Duchess of Cambridge arrives at the Place2Be Wellbeing in Schools Awards held at Mansion House in central London.
LONDON, ENGLAND - NOVEMBER 22: The Duchess of Cambridge comforts Ceri Knapton who joins her son Ethan Knapton from Forward Academy at the Place2Be Wellbeing in Schools Awards at Mansion House on November 22, 2016 in London, United Kingdom. (Photo by Eamonn M. McCormack/Getty Images)
LONDON, ENGLAND - NOVEMBER 22: The Duchess of Cambridge attends Place2Be Wellbeing in Schools Awards at Mansion House on November 22, 2016 in London, United Kingdom. (Photo by Eamonn M. McCormack/Getty Images)
LONDON, ENGLAND - NOVEMBER 22: The Duchess of Cambridge attends Place2Be Wellbeing in Schools Awards at Mansion House on November 22, 2016 in London, United Kingdom. (Photo by Eamonn M. McCormack/Getty Images)
LONDON, ENGLAND - NOVEMBER 22: The Duchess of Cambridge attends Place2Be Wellbeing in Schools Awards at Mansion House on November 22, 2016 in London, United Kingdom. (Photo by Eamonn M. McCormack/Getty Images)
LONDON, ENGLAND - NOVEMBER 22: The Duchess of Cambridge attends Place2Be Wellbeing in Schools Awards at Mansion House on November 22, 2016 in London, United Kingdom. (Photo by Eamonn M. McCormack/Getty Images)
LONDON, ENGLAND - NOVEMBER 22: The Duchess of Cambridge attends Place2Be Wellbeing in Schools Awards at Mansion House on November 22, 2016 in London, United Kingdom. (Photo by Eamonn M. McCormack/Getty Images)
LONDON, ENGLAND - NOVEMBER 22: The Duchess of Cambridge attends Place2Be Wellbeing in Schools Awards at Mansion House on November 22, 2016 in London, United Kingdom. (Photo by Eamonn M. McCormack/Getty Images)
LONDON, ENGLAND - NOVEMBER 22: The Duchess of Cambridge attends Place2Be Wellbeing in Schools Awards at Mansion House on November 22, 2016 in London, United Kingdom. (Photo by Eamonn M. McCormack/Getty Images)
Britain's Catherine, Duchess of Cambridge, arrives at the Natural History Museum in London on November 22, 2016, to attend a children's tea party to celebrate Dippy the Diplodocus's time in the museum's Hintze Hall. The centrepiece of the museum's main Hintze hall, the diplodocus skeleton will travel the country from early 2018 to late 2020 on a mission to inspire five million natural history adventures. / AFP / POOL / Yui Mok (Photo credit should read YUI MOK/AFP/Getty Images)
LONDON, UNITED KINGDOM - NOVEMBER 22: Catherine, Duchess of Cambridge makes a dinosaur egg whilst attending a children's tea party with pupils from Oakington Manor Primary School in Wembley, at the Natural History Museum to celebrate Dippy the Diplodocus's time in Hintze Hall on November 22, 2016 in London, United Kingdom. (Photo by Yui Mok - WPA Pool/Getty Images)
LONDON, UNITED KINGDOM - NOVEMBER 22: Catherine, Duchess of Cambridge cuts a cake with pupils from Oakington Manor Primary School in Wembley, at the Natural History Museum to celebrate Dippy the Diplodocus's time in Hintze Hall on November 22, 2016 in London, United Kingdom. (Photo by Yui Mok - WPA Pool/Getty Images)
LONDON, UNITED KINGDOM - NOVEMBER 22: Catherine, Duchess of Cambridge attends a children's tea party with pupils from Oakington Manor Primary School in Wembley, at the Natural History Museum to celebrate Dippy the Diplodocus's time in Hintze Hall on November 22, 2016 in London, United Kingdom. (Photo by Yui Mok - WPA Pool/Getty Images)
LONDON, UNITED KINGDOM - NOVEMBER 22: Catherine, Duchess of Cambridge attends a children's tea party with pupils from Oakington Manor Primary School in Wembley, at the Natural History Museum to celebrate Dippy the Diplodocus's time in Hintze Hall on November 22, 2016 in London, United Kingdom. (Photo by Yui Mok - WPA Pool/Getty Images)
LONDON, UNITED KINGDOM - NOVEMBER 22: Catherine, Duchess of Cambridge makes a dinosaur egg whilst attending a children's tea party with pupils from Oakington Manor Primary School in Wembley, at the Natural History Museum to celebrate Dippy the Diplodocus's time in Hintze Hall on November 22, 2016 in London, United Kingdom. (Photo by Yui Mok - WPA Pool/Getty Images)
LONDON, UNITED KINGDOM - NOVEMBER 22: Catherine, Duchess of Cambridge makes a dinosaur egg whilst attending a children's tea party with pupils from Oakington Manor Primary School in Wembley, at the Natural History Museum to celebrate Dippy the Diplodocus's time in Hintze Hall on November 22, 2016 in London, United Kingdom. (Photo by Yui Mok - WPA Pool/Getty Images)
LONDON, UNITED KINGDOM - NOVEMBER 22: Catherine, Duchess of Cambridge makes a dinosaur egg whilst attending a children's tea party with pupils from Oakington Manor Primary School in Wembley, at the Natural History Museum to celebrate Dippy the Diplodocus's time in Hintze Hall on November 22, 2016 in London, United Kingdom. (Photo by Yui Mok - WPA Pool/Getty Images)
LONDON, UNITED KINGDOM - NOVEMBER 22: Catherine, Duchess of Cambridge attends a children's tea party with pupils from Oakington Manor Primary School in Wembley, at the Natural History Museum to celebrate Dippy the Diplodocus's time in Hintze Hall on November 22, 2016 in London, United Kingdom. (Photo by Yui Mok - WPA Pool/Getty Images)
Britain's Catherine, Duchess of Cambridge (C), poses with children from Oakington Manor Primary School in front of a diplodocus skeleton, known as 'Dippy', at the Natural History Museum in London on November 22, 2016, before atttending a children's tea party to celebrate Dippy the Diplodocus's time in the museum's Hintze Hall. The centrepiece of the museum's main Hintze hall, the diplodocus skeleton will travel the country from early 2018 to late 2020 on a mission to inspire five million natural history adventures. / AFP / POOL / Yui Mok (Photo credit should read YUI MOK/AFP/Getty Images)
LONDON, UNITED KINGDOM - NOVEMBER 22: Catherine, Duchess of Cambridge attends a children's tea party with pupils from Oakington Manor Primary School in Wembley, at the Natural History Museum to celebrate Dippy the Diplodocus's time in Hintze Hall on November 22, 2016 in London, United Kingdom. (Photo by Yui Mok - WPA Pool/Getty Images)
LONDON, UNITED KINGDOM - NOVEMBER 22: Catherine, Duchess of Cambridge speaks with Head of National Public Programmes Katrina Nilsson (right) and Museum Director Sir Michael Dixon (left), as she attends a children's tea party with pupils from Oakington Manor Primary School in Wembley, at the Natural History Museum to celebrate Dippy the Diplodocus's time in Hintze Hall on November 22, 2016 in London, United Kingdom. (Photo by Yui Mok - WPA Pool/Getty Images)
Britain's Catherine, Duchess of Cambridge, makes a dinosaur egg with pupils from Oakington Manor Primary School, at the Natural History Museum in London on November 22, 2016, as she atttends a children's tea party to celebrate 'Dippy' the diplodocus's time in the museum's Hintze Hall. The centrepiece of the museum's main Hintze hall, 'Dippy' the diplodocus' skeleton will travel the country from early 2018 to late 2020 on a mission to inspire five million natural history adventures. / AFP / POOL / Yui Mok (Photo credit should read YUI MOK/AFP/Getty Images)
Britain's Kate, the Duchess of Cambridge smiles after her arrival at the Place2Be Wellbeing in Schools Awards, celebrating the ambassadors of positive mental health in schools, at Mansion House in London, Tuesday, Nov. 22, 2016. (Eamonn M. McCormack/Pool Photo via AP)
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For the evening reception, Duchess Kate attended the Place2Be Wellbeing In School Awards, and she was decked out in a gorgeous black Preen cocktail dress. The Duchess doesn't often wear black, but she definitely makes a statement when she does.

Paired with new Prada pumps with sleek cutouts along the sides, a glittering belt and a staggering pair of diamond pendant earrings on loan from the Queen. We do love to see Kate dip her hands into the royal jewelry box every now and again!

The Duchess Of Cambridge Attends Place2Be Wellbeing In Schools Awards

If this Preen dress looks familiar to you, it's probably because Kate has worn it before! While in Canada, the Duchess was a total show-stopper in the same dress in red -- and she clearly loved it so much that she bought it in multiple colors! Isn't that the best way to shop, though? You find the perfect pair of jeans and buy them in every color, in multiples.

See how Kate styled this stunning dress in red, below:

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Duchess Kate in Preen for formal reception in Canada
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Duchess Kate in Preen for formal reception in Canada
Britain's Catherine, Duchess of Cambridge, attends a reception at Government House in Victoria, British Columbia, Canada, September 26, 2016. REUTERS/Chris Wattie
Britain's Catherine, Duchess of Cambridge, leaves at the conclusion of a ceremony at Government House in Victoria, British Columbia, Canada, September 26, 2016. REUTERS/Chris Wattie
VICTORIA, BC - SEPTEMBER 26: Catherine, Duchess of Cambridge attends a reception at Government House on Day 3 of a Royal Tour of Canada on September 27, 2016 in Victoria, Canada. Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince George and Princess Charlotte are visiting Canada as part of an eight day visit to the country taking in areas such as Bella Bella, Whitehorse and Kelowna (Photo by Chris Jackson/Getty Images)
VICTORIA, BC - SEPTEMBER 26: Catherine, Duchess of Cambridge attends a reception at Government House on Day 3 of a Royal Tour of Canada on September 27, 2016 in Victoria, Canada. Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince George and Princess Charlotte are visiting Canada as part of an eight day visit to the country taking in areas such as Bella Bella, Whitehorse and Kelowna (Photo by Chris Jackson/Getty Images)
VICTORIA, BC - SEPTEMBER 26: Prince William, Duke of Cambridge attends a 'Black Rod Ceremony' during a reception at Government House on Day 3 of a Royal Tour of Canada on September 27, 2016 in Victoria, Canada. Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince George and Princess Charlotte are visiting Canada as part of an eight day visit to the country taking in areas such as Bella Bella, Whitehorse and Kelowna (Photo by Chris Jackson/Getty Images)
VICTORIA, BC - SEPTEMBER 26: Catherine, Duchess of Cambridge attends a reception at Government House on Day 3 of a Royal Tour of Canada on September 27, 2016 in Victoria, Canada. Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince George and Princess Charlotte are visiting Canada as part of an eight day visit to the country taking in areas such as Bella Bella, Whitehorse and Kelowna (Photo by Chris Jackson/Getty Images)
VICTORIA, BC - SEPTEMBER 26: Catherine, Duchess of Cambridge attends a reception at Government House on Day 3 of a Royal Tour of Canada on September 27, 2016 in Victoria, Canada. Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince George and Princess Charlotte are visiting Canada as part of an eight day visit to the country taking in areas such as Bella Bella, Whitehorse and Kelowna (Photo by Chris Jackson/Getty Images)
VICTORIA, BC - SEPTEMBER 26: Catherine, Duchess of Cambridge attends a reception at Government House on Day 3 of a Royal Tour of Canada on September 27, 2016 in Victoria, Canada. Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince George and Princess Charlotte are visiting Canada as part of an eight day visit to the country taking in areas such as Bella Bella, Whitehorse and Kelowna (Photo by Chris Jackson/Getty Images)
VICTORIA, BC - SEPTEMBER 26: Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge attend a reception at Government House on Day 3 of a Royal Tour of Canada on September 27, 2016 in Victoria, Canada. Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince George and Princess Charlotte are visiting Canada as part of an eight day visit to the country taking in areas such as Bella Bella, Whitehorse and Kelowna (Photo by Chris Jackson/Getty Images)
VICTORIA, BC - SEPTEMBER 26: Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge attend a reception at Government House on Day 3 of a Royal Tour of Canada on September 27, 2016 in Victoria, Canada. Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince George and Princess Charlotte are visiting Canada as part of an eight day visit to the country taking in areas such as Bella Bella, Whitehorse and Kelowna (Photo by Chris Jackson/Getty Images)
VICTORIA, BC - SEPTEMBER 26: Catherine, Duchess of Cambridge attends a reception at Government House on Day 3 of a Royal Tour of Canada on September 27, 2016 in Victoria, Canada. Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince George and Princess Charlotte are visiting Canada as part of an eight day visit to the country taking in areas such as Bella Bella, Whitehorse and Kelowna (Photo by Chris Jackson/Getty Images)
VICTORIA, BC - SEPTEMBER 26: Catherine, Duchess of Cambridge attends a reception at Government House on Day 3 of a Royal Tour of Canada on September 27, 2016 in Victoria, Canada. Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince George and Princess Charlotte are visiting Canada as part of an eight day visit to the country taking in areas such as Bella Bella, Whitehorse and Kelowna (Photo by Chris Jackson/Getty Images)
VICTORIA, BC - SEPTEMBER 26: Catherine, Duchess of Cambridge attends a reception at Government House on Day 3 of a Royal Tour of Canada on September 27, 2016 in Victoria, Canada. Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince George and Princess Charlotte are visiting Canada as part of an eight day visit to the country taking in areas such as Bella Bella, Whitehorse and Kelowna (Photo by Chris Jackson/Getty Images)
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