Kate Middleton breaks protocol by wearing shorts for the first time as a royal -- and people are freaking out!

The Duke and Duchess of Cambridge returned from their summer vacation in Mustique to set sail in Cowes, Isle of Wight, as part of the couple's inaugural King's Cup Regatta.

Thursday's competition saw the royal parents-of-three joining the race as skippers to raise money for eight select charities. The organization Tusk, which was led by Bear Grylls as one of Prince William's four teams, won the regatta and the coveted King's Cup! 

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Kate Middleton and Prince William compete at The King's Cup
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Kate Middleton and Prince William compete at The King's Cup
Britain's Catherine, Duchess of Cambridge smiles as she skippers a sailing boat in the eight boat regatta, The King's Cup at Cowes off the south coast of England on 8 August 2019. - The boats taking part in The Kings Cup will each represent one of the charities that are being supported this year by Their Royal Highnesses. (Photo by PETER NICHOLLS / POOL / AFP) (Photo credit should read PETER NICHOLLS/AFP/Getty Images)
COWES, ENGLAND - AUGUST 09: Catherine, Duchess of Cambridge and her husband Prince William, Duke of Cambridge competing on behalf of The Royal Foundation at the inaugural King’s Cup regatta are seen during the prize giving ceremony ahead of Cowes SailGP on August 09, 2019 in Cowes, England. (Photo by Clive Mason/Getty Images)
COWES, ENGLAND - AUGUST 09: Catherine, Duchess of Cambridge and her husband Prince William, Duke of Cambridge competing on behalf of The Royal Foundation at the inaugural King’s Cup regatta are seen during the prize giving ceremony ahead of Cowes SailGP on August 09, 2019 in Cowes, England. (Photo by Clive Mason/Getty Images)
COWES, ENGLAND - AUGUST 09: Catherine, Duchess of Cambridge and her husband Prince William, Duke of Cambridge competing on behalf of The Royal Foundation at the inaugural King’s Cup regatta are seen during the prize giving ceremony ahead of Cowes SailGP on August 09, 2019 in Cowes, England. (Photo by Clive Mason/Getty Images)
COWES, ENGLAND - AUGUST 09: Catherine, Duchess of Cambridge competing on behalf of The Royal Foundation during the prizegiving at the inaugural King’s Cup regatta much to the amusement of Prince William, Duke of Cambridge hosted by the Duke and Duchess of Cambridge ahead of Cowes SailGP on August 09, 2019 in Cowes, England. (Photo by Clive Mason/Getty Images)
COWES, ENGLAND - AUGUST 09: Catherine, Duchess of Cambridge competing on behalf of The Royal Foundation is presented the Wooden Spoon at the inaugural King’s Cup regatta much to the amusement of Prince William, Duke of Cambridge hosted by the Duke and Duchess of Cambridge ahead of Cowes SailGP on August 09, 2019 in Cowes, England. (Photo by Clive Mason/Getty Images)
COWES, ENGLAND - AUGUST 09: Catherine, Duchess of Cambridge competing on behalf of The Royal Foundation during the prizegiving at the inaugural King’s Cup regatta much to the amusement of Prince William, Duke of Cambridge hosted by the Duke and Duchess of Cambridge ahead of Cowes SailGP on August 09, 2019 in Cowes, England. (Photo by Clive Mason/Getty Images)
COWES, ENGLAND - AUGUST 09: Catherine, Duchess of Cambridge competing on behalf of The Royal Foundation is presented the Wooden Spoon at the inaugural King’s Cup regatta much to the amusement of Prince William, Duke of Cambridge hosted by the Duke and Duchess of Cambridge ahead of Cowes SailGP on August 09, 2019 in Cowes, England. (Photo by Clive Mason/Getty Images)
COWES, ENGLAND - AUGUST 08: Catherine, Duchess of Cambridge at the helm competing on behalf of The Royal Foundation in the inaugural King’s Cup regatta hosted by the Duke and Duchess of Cambridge on August 08, 2019 in Cowes, England. Their Royal Highnesses hope that The King’s Cup will become an annual event bringing greater awareness to the wider benefits of sport, whilst also raising support and funds for Action on Addiction, Place2Be, the Anna Freud National Centre for Children and Families, The Royal Foundation, Child Bereavement UK, Centrepoint, London’s Air Ambulance Charity and Tusk. (Photo by Chris Jackson/Getty Images)
Britain's Prince William, Duke of Cambridge (4th R) skippers a sailing boat in the eight boat regatta, The King's Cup at Cowes off the south coast of England on 8 August 2019. - The boats taking part in The Kings Cup will each represent one of the charities that are being supported this year by Their Royal Highnesses. (Photo by Adrian DENNIS / AFP) (Photo credit should read ADRIAN DENNIS/AFP/Getty Images)
COWES, ENGLAND - AUGUST 08: Catherine, Duchess of Cambridge at the helm competing on behalf of The Royal Foundation in the inaugural King’s Cup regatta hosted by the Duke and Duchess of Cambridge on August 08, 2019 in Cowes, England. Their Royal Highnesses hope that The King’s Cup will become an annual event bringing greater awareness to the wider benefits of sport, whilst also raising support and funds for Action on Addiction, Place2Be, the Anna Freud National Centre for Children and Families, The Royal Foundation, Child Bereavement UK, Centrepoint, London’s Air Ambulance Charity and Tusk. (Photo by Chris Jackson/Getty Images)
COWES, ENGLAND - AUGUST 08: Prince William, Duke of Cambridge at the helm competing on behalf of Child Bereavement UK during the inaugural King’s Cup regatta hosted by the Duke and Duchess of Cambridge on August 08, 2019 in Cowes, England. Their Royal Highnesses hope that The King’s Cup will become an annual event bringing greater awareness to the wider benefits of sport, whilst also raising support and funds for Action on Addiction, Place2Be, the Anna Freud National Centre for Children and Families, The Royal Foundation, Child Bereavement UK, Centrepoint, London’s Air Ambulance Charity and Tusk. (Photo by Chris Jackson/Getty Images)
COWES, ENGLAND - AUGUST 08: Catherine, Duchess of Cambridge at the helm competing on behalf of The Royal Foundation in the inaugural King’s Cup regatta hosted by the Duke and Duchess of Cambridge on August 08, 2019 in Cowes, England. Their Royal Highnesses hope that The King’s Cup will become an annual event bringing greater awareness to the wider benefits of sport, whilst also raising support and funds for Action on Addiction, Place2Be, the Anna Freud National Centre for Children and Families, The Royal Foundation, Child Bereavement UK, Centrepoint, London’s Air Ambulance Charity and Tusk. (Photo by Chris Jackson/Getty Images)
COWES, ENGLAND - AUGUST 09: Catherine, Duchess of Cambridge takes part in the King's Cup regatta on August 9, 2019 at Cowes on the Isle of Wight, England. The royal couple are going head to head in the regatta in support of their charitable causes. (Photo by Andrew Matthews - WPA Pool/Getty Images)
COWES, ENGLAND - AUGUST 08: Catherine, Duchess of Cambridge competing on behalf of The Royal Foundation in the inaugural King’s Cup regatta hosted by the Duke and Duchess of Cambridge on August 08, 2019 in Cowes, England. Their Royal Highnesses hope that The King’s Cup will become an annual event bringing greater awareness to the wider benefits of sport, whilst also raising support and funds for Action on Addiction, Place2Be, the Anna Freud National Centre for Children and Families, The Royal Foundation, Child Bereavement UK, Centrepoint, London’s Air Ambulance Charity and Tusk. (Photo by Chris Jackson/Getty Images)
COWES, ENGLAND - AUGUST 08: Catherine, Duchess of Cambridge competing on behalf of The Royal Foundation in the inaugural King’s Cup regatta hosted by the Duke and Duchess of Cambridge on August 08, 2019 in Cowes, England. Their Royal Highnesses hope that The King’s Cup will become an annual event bringing greater awareness to the wider benefits of sport, whilst also raising support and funds for Action on Addiction, Place2Be, the Anna Freud National Centre for Children and Families, The Royal Foundation, Child Bereavement UK, Centrepoint, London’s Air Ambulance Charity and Tusk. (Photo by Chris Jackson/Getty Images)
Britain's Prince William takes part in the King's Cup regatta at Cowes on the Isle of Wight, England, Thursday, Aug. 8, 2019. The royal couple are going head to head in the regatta in support of their charitable causes. (Aaron Chown/Pool Photo via AP)
COWES, ENGLAND - AUGUST 09: Catherine, Duchess of Cambridge takes part in the King's Cup regatta on August 9, 2019 at Cowes on the Isle of Wight, England. The royal couple are going head to head in the regatta in support of their charitable causes. (Photo by Peter Nicholls - WPA Pool/Getty Images)
COWES, ENGLAND - AUGUST 08: Prince William, Duke of Cambridge at the helm competing on behalf of Child Bereavement UK during the inaugural King’s Cup regatta hosted by the Duke and Duchess of Cambridge on August 08, 2019 in Cowes, England. Their Royal Highnesses hope that The King’s Cup will become an annual event bringing greater awareness to the wider benefits of sport, whilst also raising support and funds for Action on Addiction, Place2Be, the Anna Freud National Centre for Children and Families, The Royal Foundation, Child Bereavement UK, Centrepoint, London’s Air Ambulance Charity and Tusk. (Photo by Chris Jackson/Getty Images)
COWES, ENGLAND - AUGUST 09: Catherine, Duchess of Cambridge takes part in the King's Cup regatta on August 9, 2019 at Cowes on the Isle of Wight, England. The royal couple are going head to head in the regatta in support of their charitable causes. (Photo by Andrew Matthews - WPA Pool/Getty Images)
Britain's Catherine, Duchess of Cambridge skippers a sailing boat in the eight boat regatta, The King's Cup at Cowes off the south coast of England on 8 August 2019. - The boats taking part in The Kings Cup will each represent one of the charities that are being supported this year by Their Royal Highnesses. (Photo by Andrew Matthews / POOL / AFP) (Photo credit should read ANDREW MATTHEWS/AFP/Getty Images)
Britain's Catherine, Duchess of Cambridge skippers a sailing boat in the eight boat regatta, The King's Cup at Cowes off the south coast of England on 8 August 2019. - The boats taking part in The Kings Cup will each represent one of the charities that are being supported this year by Their Royal Highnesses. (Photo by PETER NICHOLLS / POOL / AFP) (Photo credit should read PETER NICHOLLS/AFP/Getty Images)
Britain's Catherine, Duchess of Cambridge (C) skippers a sailing boat in the eight boat regatta, The King's Cup at Cowes off the south coast of England on 8 August 2019. - The boats taking part in The Kings Cup will each represent one of the charities that are being supported this year by Their Royal Highnesses. (Photo by Adrian DENNIS / AFP) (Photo credit should read ADRIAN DENNIS/AFP/Getty Images)
The Duchess of Cambridge takes part in the King's Cup regatta at Cowes on the Isle of Wight. The royal couple are going head to head in the regatta in support of their charitable causes.
COWES, ENGLAND - AUGUST 08: Catherine, Duchess of Cambridge at the helm competing on behalf of The Royal Foundation in the inaugural King’s Cup regatta hosted by the Duke and Duchess of Cambridge on August 08, 2019 in Cowes, England. Their Royal Highnesses hope that The King’s Cup will become an annual event bringing greater awareness to the wider benefits of sport, whilst also raising support and funds for Action on Addiction, Place2Be, the Anna Freud National Centre for Children and Families, The Royal Foundation, Child Bereavement UK, Centrepoint, London’s Air Ambulance Charity and Tusk. (Photo by Chris Jackson/Getty Images)
COWES, ENGLAND - AUGUST 08: Catherine, Duchess of Cambridge at the helm competing on behalf of The Royal Foundation in the inaugural King’s Cup regatta hosted by the Duke and Duchess of Cambridge on August 08, 2019 in Cowes, England. Their Royal Highnesses hope that The King’s Cup will become an annual event bringing greater awareness to the wider benefits of sport, whilst also raising support and funds for Action on Addiction, Place2Be, the Anna Freud National Centre for Children and Families, The Royal Foundation, Child Bereavement UK, Centrepoint, London’s Air Ambulance Charity and Tusk. (Photo by Chris Jackson/Getty Images)
COWES, ENGLAND - AUGUST 08: Catherine, Duchess of Cambridge at the helm competing on behalf of The Royal Foundation in the inaugural King’s Cup regatta hosted by the Duke and Duchess of Cambridge on August 08, 2019 in Cowes, England. Their Royal Highnesses hope that The King’s Cup will become an annual event bringing greater awareness to the wider benefits of sport, whilst also raising support and funds for Action on Addiction, Place2Be, the Anna Freud National Centre for Children and Families, The Royal Foundation, Child Bereavement UK, Centrepoint, London’s Air Ambulance Charity and Tusk. (Photo by Chris Jackson/Getty Images)
COWES, ENGLAND - AUGUST 08: Catherine, Duchess of Cambridge at the helm competing on behalf of The Royal Foundation in the inaugural King’s Cup regatta hosted by the Duke and Duchess of Cambridge on August 08, 2019 in Cowes, England. Their Royal Highnesses hope that The King’s Cup will become an annual event bringing greater awareness to the wider benefits of sport, whilst also raising support and funds for Action on Addiction, Place2Be, the Anna Freud National Centre for Children and Families, The Royal Foundation, Child Bereavement UK, Centrepoint, London’s Air Ambulance Charity and Tusk. (Photo by Chris Jackson/Getty Images)
COWES, ENGLAND - AUGUST 08: Catherine, Duchess of Cambridge at the helm competing on behalf of The Royal Foundation in the inaugural King’s Cup regatta hosted by the Duke and Duchess of Cambridge on August 08, 2019 in Cowes, England. Their Royal Highnesses hope that The King’s Cup will become an annual event bringing greater awareness to the wider benefits of sport, whilst also raising support and funds for Action on Addiction, Place2Be, the Anna Freud National Centre for Children and Families, The Royal Foundation, Child Bereavement UK, Centrepoint, London’s Air Ambulance Charity and Tusk. (Photo by Chris Jackson/Getty Images)
Britain's Catherine, Duchess of Cambridge smiles as she skippers a sailing boat in the eight boat regatta, The King's Cup at Cowes off the south coast of England on 8 August 2019. - The boats taking part in The Kings Cup will each represent one of the charities that are being supported this year by Their Royal Highnesses. (Photo by PETER NICHOLLS / POOL / AFP) (Photo credit should read PETER NICHOLLS/AFP/Getty Images)
COWES, ENGLAND - AUGUST 08: Catherine, Duchess of Cambridge and her crew competing on behalf of The Royal Foundation in the inaugural King’s Cup regatta hosted by the Duke and Duchess of Cambridge on August 08, 2019 in Cowes, England. Their Royal Highnesses hope that The King’s Cup will become an annual event bringing greater awareness to the wider benefits of sport, whilst also raising support and funds for Action on Addiction, Place2Be, the Anna Freud National Centre for Children and Families, The Royal Foundation, Child Bereavement UK, Centrepoint, London’s Air Ambulance Charity and Tusk. (Photo by Chris Jackson/Getty Images)
COWES, ENGLAND - AUGUST 08: Prince William, Duke of Cambridge at the helm competing on behalf of Child Bereavement UK during the inaugural King’s Cup regatta hosted by the Duke and Duchess of Cambridge on August 08, 2019 in Cowes, England. Their Royal Highnesses hope that The King’s Cup will become an annual event bringing greater awareness to the wider benefits of sport, whilst also raising support and funds for Action on Addiction, Place2Be, the Anna Freud National Centre for Children and Families, The Royal Foundation, Child Bereavement UK, Centrepoint, London’s Air Ambulance Charity and Tusk. (Photo by Chris Jackson/Getty Images)
COWES, ENGLAND - AUGUST 08: Prince William, Duke of Cambridge at the helm competing on behalf of Child Bereavement UK during the inaugural King’s Cup regatta hosted by the Duke and Duchess of Cambridge on August 08, 2019 in Cowes, England. Their Royal Highnesses hope that The King’s Cup will become an annual event bringing greater awareness to the wider benefits of sport, whilst also raising support and funds for Action on Addiction, Place2Be, the Anna Freud National Centre for Children and Families, The Royal Foundation, Child Bereavement UK, Centrepoint, London’s Air Ambulance Charity and Tusk. (Photo by Chris Jackson/Getty Images)
Britain's Prince William, Duke of Cambridge skippers a sailing boat in the eight boat regatta, The King's Cup at Cowes off the south coast of England on August 8, 2019. - The boats taking part in The Kings Cup will each represent one of the charities that are being supported this year by Their Royal Highnesses. (Photo by PETER NICHOLLS / POOL / AFP) (Photo credit should read PETER NICHOLLS/AFP/Getty Images)
COWES, ENGLAND - AUGUST 08: Catherine, Duchess of Cambridge competing in the inaugural King’s Cup regatta hosted by the Duke and Duchess of Cambridge on August 08, 2019 in Cowes, England. Their Royal Highnesses hope that The King’s Cup will become an annual event bringing greater awareness to the wider benefits of sport, whilst also raising support and funds for Action on Addiction, Place2Be, the Anna Freud National Centre for Children and Families, The Royal Foundation, Child Bereavement UK, Centrepoint, London’s Air Ambulance Charity and Tusk. (Photo by Chris Jackson/Getty Images)
COWES, ENGLAND - AUGUST 08: Catherine, Duchess of Cambridge at the helm competing on behalf of The Royal Foundation in the inaugural King’s Cup regatta hosted by the Duke and Duchess of Cambridge on August 08, 2019 in Cowes, England. Their Royal Highnesses hope that The King’s Cup will become an annual event bringing greater awareness to the wider benefits of sport, whilst also raising support and funds for Action on Addiction, Place2Be, the Anna Freud National Centre for Children and Families, The Royal Foundation, Child Bereavement UK, Centrepoint, London’s Air Ambulance Charity and Tusk. (Photo by Chris Jackson/Getty Images)
COWES, ENGLAND - AUGUST 08: A general view of the racing yachts hoist the spinnaker during the inaugural King’s Cup regatta hosted by the Duke and Duchess of Cambridge on August 08, 2019 in Cowes, England. Their Royal Highnesses hope that The King’s Cup will become an annual event bringing greater awareness to the wider benefits of sport, whilst also raising support and funds for Action on Addiction, Place2Be, the Anna Freud National Centre for Children and Families, The Royal Foundation, Child Bereavement UK, Centrepoint, London’s Air Ambulance Charity and Tusk. (Photo by Chris Jackson/Getty Images)
COWES, ENGLAND - AUGUST 08: Catherine, Duchess of Cambridge at the helm competing on behalf of The Royal Foundation in the inaugural King’s Cup regatta hosted by the Duke and Duchess of Cambridge on August 08, 2019 in Cowes, England. Their Royal Highnesses hope that The King’s Cup will become an annual event bringing greater awareness to the wider benefits of sport, whilst also raising support and funds for Action on Addiction, Place2Be, the Anna Freud National Centre for Children and Families, The Royal Foundation, Child Bereavement UK, Centrepoint, London’s Air Ambulance Charity and Tusk. (Photo by Chris Jackson/Getty Images)
Britain's Kate, Duchess of Cambridge takes part in the King's Cup regatta at Cowes on the Isle of Wight, England, Thursday, Aug. 8, 2019. The royal couple are going head to head in the regatta in support of their charitable causes. (Peter Nicholls/Pool Photo via AP)
Britain's Kate, Duchess of Cambridge takes part in the King's Cup regatta at Cowes on the Isle of Wight, England, Thursday, Aug. 8, 2019. The royal couple are going head to head in the regatta in support of their charitable causes. (Peter Nicholls/Pool Photo via AP)
Britain's Kate, Duchess of Cambridge takes part in the King's Cup regatta at Cowes on the Isle of Wight, England, Thursday, Aug. 8, 2019. The royal couple are going head to head in the regatta in support of their charitable causes. (Andrew Matthews/Pool Photo via AP)
Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge host the inaugural regatta The King's Cup to raise awareness and funds for eight of Their Royal Highnesses' patronages. Credit:Matrix / MediaPunch /IPX
Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge host the inaugural regatta The King's Cup to raise awareness and funds for eight of Their Royal Highnesses' patronages. Credit:Matrix / MediaPunch /IPX
Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge host the inaugural regatta The King's Cup to raise awareness and funds for eight of Their Royal Highnesses' patronages. Credit:Matrix / MediaPunch /IPX
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And while a toothless Prince George and a sassy Princess Charlotte definitely stole the show at the event, royal fans were quick to notice just how casual the duchess was in her white polo and jacket by Gill Marine, New Balance tennis shoes and navy shorts. Her outfit was a very big deal considering the reaction from Twitter: it was the first time the royal's been seen in shorts... EVER.

Given the United Kingdom's recent record-breaking temperatures and the nature of the event, it's no surprise that the duchess swapped her trousers and leggings for shorts. For previous sailing events, the duchess instead opted for leggings, jeans and frequently heels. 

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Princess Charlotte pulls cheeky move at King's Cup
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Princess Charlotte pulls cheeky move at King's Cup
COWES, ENGLAND - AUGUST 08: Princess Charlotte and Catherine, Duchess of Cambridge attend the presentation following the King's Cup Regatta on August 08, 2019 in Cowes, England. (Photo by Samir Hussein/WireImage)
The Duchess of Cambridge with Prince George and Princess Charlotte look through a window at the prize giving after the King's Cup regatta at Cowes on the Isle of Wight. (Photo by Aaron Chown/PA Images via Getty Images)
COWES, ENGLAND - AUGUST 08: Princess Charlotte of Cambridge and Catherine, Duchess of Cambridge having fun together after the inaugural King’s Cup regatta hosted by the Duke and Duchess of Cambridge on August 08, 2019 in Cowes, England. Their Royal Highnesses hope that The King’s Cup will become an annual event bringing greater awareness to the wider benefits of sport, whilst also raising support and funds for Action on Addiction, Place2Be, the Anna Freud National Centre for Children and Families, The Royal Foundation, Child Bereavement UK, Centrepoint, London’s Air Ambulance Charity and Tusk. (Photo by Chris Jackson/Getty Images)
COWES, ENGLAND - AUGUST 08: Princess Charlotte of Cambridge and Catherine, Duchess of Cambridge having fun together after the inaugural King’s Cup regatta hosted by the Duke and Duchess of Cambridge on August 08, 2019 in Cowes, England. Their Royal Highnesses hope that The King’s Cup will become an annual event bringing greater awareness to the wider benefits of sport, whilst also raising support and funds for Action on Addiction, Place2Be, the Anna Freud National Centre for Children and Families, The Royal Foundation, Child Bereavement UK, Centrepoint, London’s Air Ambulance Charity and Tusk. (Photo by Chris Jackson/Getty Images)
COWES, ENGLAND - AUGUST 08: Princess Charlotte of Cambridge and Catherine, Duchess of Cambridge having fun together after the inaugural King’s Cup regatta hosted by the Duke and Duchess of Cambridge on August 08, 2019 in Cowes, England. Their Royal Highnesses hope that The King’s Cup will become an annual event bringing greater awareness to the wider benefits of sport, whilst also raising support and funds for Action on Addiction, Place2Be, the Anna Freud National Centre for Children and Families, The Royal Foundation, Child Bereavement UK, Centrepoint, London’s Air Ambulance Charity and Tusk. (Photo by Chris Jackson/Getty Images)
COWES, ENGLAND - AUGUST 08: Princess Charlotte and Catherine, Duchess of Cambridge attend the presentation following the King's Cup Regatta on August 08, 2019 in Cowes, England. (Photo by Samir Hussein/WireImage)
COWES, ENGLAND - AUGUST 08: Princess Charlotte of Cambridge and Catherine, Duchess of Cambridge having fun together after the inaugural King’s Cup regatta hosted by the Duke and Duchess of Cambridge on August 08, 2019 in Cowes, England. Their Royal Highnesses hope that The King’s Cup will become an annual event bringing greater awareness to the wider benefits of sport, whilst also raising support and funds for Action on Addiction, Place2Be, the Anna Freud National Centre for Children and Families, The Royal Foundation, Child Bereavement UK, Centrepoint, London’s Air Ambulance Charity and Tusk. (Photo by Chris Jackson/Getty Images)
Britain's Princess Charlotte of Cambridge (L) reacts with her mother, Britain's Catherine, Duchess of Cambridge prior to the presentation ceremony following the eight boat regatta, The King's Cup at Cowes off the south coast of England on August 8, 201 9. - The boats taking part in The Kings Cup will each represent one of the charities that are being supported this year by Their Royal Highnesses. (Photo by Adrian DENNIS / AFP) (Photo credit should read ADRIAN DENNIS/AFP/Getty Images)
COWES, ENGLAND - AUGUST 08: Princess Charlotte (C) at The Royal Yacht Squadron during the inaugural Kings Cup regatta hosted by the Duke and Duchess of Cambridge on August 08, 2019 in Cowes, England. Their Royal Highnesses hope that The Kings Cup will become an annual event bringing greater awareness to the wider benefits of sport, whilst also raising support and funds for Action on Addiction, Place2Be, the Anna Freud National Centre for Children and Families, The Royal Foundation, Child Bereavement UK, Centrepoint, Londonís Air Ambulance Charity and Tusk. on August 08, 2019 in Cowes, England. (Photo by Antony Jones/Getty Images)
COWES, ENGLAND - AUGUST 08: Princess Charlotte of Cambridge and Catherine, Duchess of Cambridge having fun together after the inaugural King’s Cup regatta hosted by the Duke and Duchess of Cambridge on August 08, 2019 in Cowes, England. Their Royal Highnesses hope that The King’s Cup will become an annual event bringing greater awareness to the wider benefits of sport, whilst also raising support and funds for Action on Addiction, Place2Be, the Anna Freud National Centre for Children and Families, The Royal Foundation, Child Bereavement UK, Centrepoint, London’s Air Ambulance Charity and Tusk. (Photo by Chris Jackson/Getty Images)
COWES, ENGLAND - AUGUST 08: Princess Charlotte attends the King's Cup Regatta on August 08, 2019 in Cowes, England. (Photo by Karwai Tang/WireImage)
COWES, ENGLAND - AUGUST 08: Prince George watches the inaugural King’s Cup regatta hosted by the Duke and Duchess of Cambridge on August 08, 2019 in Cowes, England. Their Royal Highnesses hope that The King’s Cup will become an annual event bringing greater awareness to the wider benefits of sport, whilst also raising support and funds for Action on Addiction, Place2Be, the Anna Freud National Centre for Children and Families, The Royal Foundation, Child Bereavement UK, Centrepoint, London’s Air Ambulance Charity and Tusk. (Photo by Chris Jackson/Getty Images)
COWES, ENGLAND - AUGUST 08: Prince George watches the inaugural King’s Cup regatta hosted by the Duke and Duchess of Cambridge on August 08, 2019 in Cowes, England. Their Royal Highnesses hope that The King’s Cup will become an annual event bringing greater awareness to the wider benefits of sport, whilst also raising support and funds for Action on Addiction, Place2Be, the Anna Freud National Centre for Children and Families, The Royal Foundation, Child Bereavement UK, Centrepoint, London’s Air Ambulance Charity and Tusk. (Photo by Chris Jackson/Getty Images)
COWES, ENGLAND - AUGUST 08: Michael Middleton and Prince George watch the inaugural King’s Cup regatta hosted by the Duke and Duchess of Cambridge on August 08, 2019 in Cowes, England. Their Royal Highnesses hope that The King’s Cup will become an annual event bringing greater awareness to the wider benefits of sport, whilst also raising support and funds for Action on Addiction, Place2Be, the Anna Freud National Centre for Children and Families, The Royal Foundation, Child Bereavement UK, Centrepoint, London’s Air Ambulance Charity and Tusk. (Photo by Chris Jackson/Getty Images)
COWES, ENGLAND - AUGUST 08: Carole Middleton, Michael Middleton and Prince George watch the inaugural King’s Cup regatta hosted by the Duke and Duchess of Cambridge on August 08, 2019 in Cowes, England. Their Royal Highnesses hope that The King’s Cup will become an annual event bringing greater awareness to the wider benefits of sport, whilst also raising support and funds for Action on Addiction, Place2Be, the Anna Freud National Centre for Children and Families, The Royal Foundation, Child Bereavement UK, Centrepoint, London’s Air Ambulance Charity and Tusk. (Photo by Chris Jackson/Getty Images)
COWES, ENGLAND - AUGUST 08: Prince George watches the inaugural King’s Cup regatta hosted by the Duke and Duchess of Cambridge on August 08, 2019 in Cowes, England. Their Royal Highnesses hope that The King’s Cup will become an annual event bringing greater awareness to the wider benefits of sport, whilst also raising support and funds for Action on Addiction, Place2Be, the Anna Freud National Centre for Children and Families, The Royal Foundation, Child Bereavement UK, Centrepoint, London’s Air Ambulance Charity and Tusk. (Photo by Chris Jackson/Getty Images)
The Duchess of Cambridge with Princess Charlotte look through a window at the prize giving after the King's Cup regatta at Cowes on the Isle of Wight. (Photo by Andrew Matthews/PA Images via Getty Images)
COWES, ENGLAND - AUGUST 08: Michael Middleton and Prince George watch the inaugural King’s Cup regatta hosted by the Duke and Duchess of Cambridge on August 08, 2019 in Cowes, England. Their Royal Highnesses hope that The King’s Cup will become an annual event bringing greater awareness to the wider benefits of sport, whilst also raising support and funds for Action on Addiction, Place2Be, the Anna Freud National Centre for Children and Families, The Royal Foundation, Child Bereavement UK, Centrepoint, London’s Air Ambulance Charity and Tusk. (Photo by Chris Jackson/Getty Images)
COWES, ENGLAND - AUGUST 08: Prince George attends the King's Cup Regatta on August 08, 2019 in Cowes, England. (Photo by Karwai Tang/WireImage)
COWES, ENGLAND - AUGUST 08: Michael Middleton and Prince George watch the inaugural King’s Cup regatta hosted by the Duke and Duchess of Cambridge on August 08, 2019 in Cowes, England. Their Royal Highnesses hope that The King’s Cup will become an annual event bringing greater awareness to the wider benefits of sport, whilst also raising support and funds for Action on Addiction, Place2Be, the Anna Freud National Centre for Children and Families, The Royal Foundation, Child Bereavement UK, Centrepoint, London’s Air Ambulance Charity and Tusk. (Photo by Chris Jackson/Getty Images)
COWES, ENGLAND - AUGUST 09: Prince George watches the inaugural King’s Cup regatta hosted by the Duke and Duchess of Cambridge on August 9, 2019 at Cowes on the Isle of Wight, England. The royal couple are going head to head in the regatta in support of their charitable causes. (Photo by Peter Nicholls - WPA Pool/Getty Images)
COWES, ENGLAND - AUGUST 08: Michael Middleton and Prince George watch the inaugural King’s Cup regatta hosted by the Duke and Duchess of Cambridge on August 08, 2019 in Cowes, England. Their Royal Highnesses hope that The King’s Cup will become an annual event bringing greater awareness to the wider benefits of sport, whilst also raising support and funds for Action on Addiction, Place2Be, the Anna Freud National Centre for Children and Families, The Royal Foundation, Child Bereavement UK, Centrepoint, London’s Air Ambulance Charity and Tusk. (Photo by Chris Jackson/Getty Images)
COWES, ENGLAND - AUGUST 08: Prince George watches the inaugural King’s Cup regatta hosted by the Duke and Duchess of Cambridge on August 08, 2019 in Cowes, England. Their Royal Highnesses hope that The King’s Cup will become an annual event bringing greater awareness to the wider benefits of sport, whilst also raising support and funds for Action on Addiction, Place2Be, the Anna Freud National Centre for Children and Families, The Royal Foundation, Child Bereavement UK, Centrepoint, London’s Air Ambulance Charity and Tusk. (Photo by Chris Jackson/Getty Images)
COWES, ENGLAND - AUGUST 08: Princess Charlotte and Catherine, Duchess of Cambridge attend the presentation following the King's Cup Regatta on August 08, 2019 in Cowes, England. (Photo by Samir Hussein/WireImage)
The Duchess of Cambridge with Princess Charlotte and Carole Middleton (left) look through a window at the prize giving after the King's Cup regatta at Cowes on the Isle of Wight. (Photo by Aaron Chown/PA Images via Getty Images)
The Duchess of Cambridge with Prince George and Princess Charlotte look through a window at the prize giving after the King's Cup regatta at Cowes on the Isle of Wight. (Photo by Aaron Chown/PA Images via Getty Images)
The Duchess of Cambridge with Princess Charlotte look through a window at the prize giving after the King's Cup regatta at Cowes on the Isle of Wight. (Photo by Aaron Chown/PA Images via Getty Images)
COWES, ENGLAND - AUGUST 08: Prince George of Cambridge and Princess Charlotte of Cambridge look through a window at the prize giving after the King's Cup regatta on August 8, 2019 in Cowes, England. (Photo by Andrew Matthews - WPA Pool/Getty Images)
COWES, ENGLAND - AUGUST 08: Prince George (L) with Princess Charlotte (C) at The Royal Yacht Squadron during the inaugural Kings Cup regatta hosted by the Duke and Duchess of Cambridge on August 08, 2019 in Cowes, England. Their Royal Highnesses hope that The Kings Cup will become an annual event bringing greater awareness to the wider benefits of sport, whilst also raising support and funds for Action on Addiction, Place2Be, the Anna Freud National Centre for Children and Families, The Royal Foundation, Child Bereavement UK, Centrepoint, Londonís Air Ambulance Charity and Tusk. on August 08, 2019 in Cowes, England. (Photo by Antony Jones/Getty Images)
COWES, ENGLAND - AUGUST 08: Princess Charlotte (C) at The Royal Yacht Squadron during the inaugural Kings Cup regatta hosted by the Duke and Duchess of Cambridge on August 08, 2019 in Cowes, England. Their Royal Highnesses hope that The Kings Cup will become an annual event bringing greater awareness to the wider benefits of sport, whilst also raising support and funds for Action on Addiction, Place2Be, the Anna Freud National Centre for Children and Families, The Royal Foundation, Child Bereavement UK, Centrepoint, Londonís Air Ambulance Charity and Tusk. on August 08, 2019 in Cowes, England. (Photo by Antony Jones/Getty Images)
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As part of Thursday's regatta, Prince William and Duchess Kate each chose four of their patronages to highlight: Prince William selected Child Bereavement UK, Centrepoint, London’s Air Ambulance Charity 30th Anniversary Campaign and Tusk, while Kate opted to support The Anna Freud National Centre for Children and Families, Action on Addiction, Place2Be and The Royal Foundation's work with Early Years.

Grylls' team won first place in both of the races, while the Duchess Kate-led Early Years foundation as part of The Royal Foundation received a wooden spoon for coming in eighth place. 

"Their Royal Highnesses hope that The King’s Cup will become an annual event, bringing greater awareness to the wider benefits of sport, whilst also raising support and funds for the causes that The Duke and Duchess support," explained Kensington Palace

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Duchess Kate's sportiest moments
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Duchess Kate's sportiest moments
Britain's Catherine, Duchess of Cambridge plays hockey with the GB hockey teams at the Riverside Arena in the Olympic Park in London March 15, 2012. REUTERS/Chris Jackson/pool (BRITAIN - Tags: SPORT ENTERTAINMENT ROYALS SOCIETY OLYMPICS)
Britain's Catherine, Duchess of Cambridge plays hockey with the GB hockey teams at the Riverside Arena in the Olympic Park in London March 15, 2012. REUTERS/Chris Jackson/pool (BRITAIN - Tags: SPORT ENTERTAINMENT ROYALS SOCIETY OLYMPICS)
KLOSTERS, SWITZERLAND - MARCH 19: Prince William and girlfriend Kate Middleton use a T-bar drag lift whilst on a skiing holiday on March 19, 2008 in Klosters, Switzerland. (Photo by Indigo/Getty Images)
Britain's Catherine, Duchess of Cambridge plays hockey with the GB hockey teams at the Riverside Arena in the Olympic Park in London March 15, 2012. REUTERS/Chris Jackson/pool (BRITAIN - Tags: SPORT ENTERTAINMENT ROYALS SOCIETY OLYMPICS)
Catherine, Duchess of Cambridge plays table tennis during a visit to Bacon's college to launch the Coach core sports programme, which is a partnership between the Royal Foundation of The Duke and Duchess of Cambridge and Greenhouse charity, a day before the London 2012 Olympics opening ceremony in Rotherhithe, London July 26, 2012. REUTERS/Chris Jackson/Pool (BRITAIN - Tags: ENTERTAINMENT ROYALS SPORT TABLE TENNIS OLYMPICS)
Britain's Catherine, Duchess of Cambridge plays table tennis during a visit to Bacon's college to launch the Coach core sports programme, which is a partnership between the Royal Foundation of The Duke and Duchess of Cambridge and Greenhouse charity, a day before the London 2012 Olympics opening ceremony in Rotherhithe, London July 26, 2012. REUTERS/Chris Jackson/Pool (BRITAIN - Tags: EDUCATION SPORT OLYMPICS ROYALS ENTERTAINMENT)
Britain's Catherine, Duchess of Cambridge plays table tennis during a visit to Bacon's college to launch the Coach core sports programme, which is a partnership between the Royal Foundation of The Duke and Duchess of Cambridge and Greenhouse charity, a day before the London 2012 Olympics opening ceremony in Rotherhithe, London July 26, 2012. REUTERS/Chris Jackson/Pool (BRITAIN - Tags: EDUCATION SPORT OLYMPICS ROYALS ENTERTAINMENT)
Catherine, Duchess of Cambridge leaves the Copper Box stadium after watching Great Britain play Lithuania in goalball at the London 2012 Paralympic Games August 30, 2012. REUTERS/Stefan Rousseau/POOL (BRITAIN - Tags: ROYALS ENTERTAINMENT SPORT)
Britain's Prince William and his wife Catherine, Duchess of Cambridge play a reaction game in the new gym during the official launch of The Football Association's National Football Centre at St George's Park in Burton upon Trent, central England October 9, 2012. REUTERS/Chris Jackson/Pool (BRITAIN - Tags: ROYALS SPORT SOCCER ENTERTAINMENT)
Britain's Catherine, Duchess of Cambridge, plays hockey during a visit to her former preparatory school St. Andrew's, which she attended from 1986 to 1995, in Berkshire, southern England November 30, 2012. REUTERS/Arthur Edwards/Pool (BRITAIN - Tags: ENTERTAINMENT EDUCATION ROYALS)
Britain's Catherine, Duchess of Cambridge, plays hockey during a visit to her former preparatory school St. Andrew's, which she attended from 1986 to 1995, near Pangbourne in Berkshire, southern England November 30, 2012. REUTERS/Arthur Edwards/Pool (BRITAIN - Tags: ENTERTAINMENT EDUCATION ROYALS)
Britain's Catherine, Duchess of Cambridge, plays volleyball as she attends a SportsAid athlete workshop at the Copper Box in the Olympic Park in London October 18, 2013. REUTERS/David Bebber/pool (BRITAIN - Tags: ENTERTAINMENT ROYALS SPORT TPX IMAGES OF THE DAY SPORT VOLLEYBALL)
Britain's Catherine, Duchess of Cambridge, plays hockey during a visit to her former preparatory school St. Andrew's, which she attended from 1986 to 1995, near Pangbourne in Berkshire, southern England November 30, 2012. REUTERS/Arthur Edwards/Pool (BRITAIN - Tags: ENTERTAINMENT EDUCATION ROYALS)
Britain's Kate, Duchess of Cambridge takes part in welly wanging, as Prince William (L) and Prince Harry watch, with children and representatives from charities and Aardman Animations, during a meeting of the Charities Forum at the British Academy of Film and Television Arts (BAFTA) in London, October 26, 2015. REUTERS/Tim Ireland/Pool
Britain's Kate, Duchess of Cambridge takes part in welly wanging, as Prince William watches, with children and representatives from charities and Aardman Animations, during a meeting of the Charities Forum at the British Academy of Film and Television Arts (BAFTA) in London, October 26, 2015. REUTERS/Ian Vogler/Pool
Britain's Catherine, Duchess of Cambridge, plays table tennis as she attends a charity event at city company ICAP, in central London, Britain December 9, 2015. REUTERS/Jeremy Selwyn/pool
Britain's Catherine, Duchess of Cambridge, plays cricket with children at a ground in Mumbai, India, April 10, 2016. REUTERS/Danish Siddiqui
Britain's Catherine, Duchess of Cambridge, plays table tennis as she attends a charity event at city company ICAP, in central London, Britain December 9, 2015. REUTERS/Jeremy Selwyn/pool
Britain's Catherine, Duchess of Cambridge plays cricket with children and former Indian cricketers Sachin Tendulkar (L) and Dilip Vengsarkar (R) at a ground in Mumbai, India, April 10, 2016. REUTERS/Danish Siddiqui
Britain's Catherine, Duchess of Cambridge, plays cricket with children at a ground in Mumbai, India, April 10, 2016. REUTERS/Danish Siddiqui TPX IMAGES OF THE DAY
The Duchess of Cambridge plays basketball at the Donald Dewer Leisure centre in Glasgow.
The Duchess of Cambridge plays basketball at the Donald Dewer Leisure centre in Glasgow.
The Duchess of Cambridge plays co-ordination games Kaionel during her visit the Anna Freud Centre for Children in Islington.
Catherine, Britain's Duchess of Cambridge, runs across Manly beach in Sydney April 18, 2014. Britain's Prince William and his wife Kate are on the second leg of a 19 day official visit to New Zealand and Australia with their son George. REUTERS/Phil Noble (AUSTRALIA - Tags: ROYALS ENTERTAINMENT)
Britain's Kate, The Duchess of Cambridge, joins Ben Ainslie, front right, and the Land Rover BAR team, who are challenging for the 2017 America's Cup, on board their training boat as they run a training circuit on the Solent in Portsmouth, Britain, May 20, 2016. REUTERS/Frank Augstein/Pool
Britain's Prince William, reacts with Kate, Duchess of Cambridge, after running in a relay race, during a training event to promote the charity Heads Together, at the Queen Elizabeth II Park in London, Britain, February 5, 2017. REUTERS/Alastair Grant/Pool
The Duchess of Cambridge rows in a dragon boat across Dalvay lake in Charlottetown, Prince Edward Island, Canada. 
The Duchess of Cambridge takes to the water as joins Sir Ben Ainslie (not in picture) and the crew of the Land Rover BAR for training circuit on the Solent when she visited the Land Rover BAR Base HQ in Portsmouth.
Britiain's Prince William and Catherine, Duchess of Cambridge, disembark from a tall ship after lowering sail in Victoria, British Columbia, Canada, October 1, 2016. REUTERS/Chris Wattie
Britain's Prince William, Kate, Duchess of Cambridge, and Prince Harry take part in a relay race, during a training event to promote the charity Heads Together, at the Queen Elizabeth II Park in London, Britain, February 5, 2017. REUTERS/Alastair Grant/Pool TPX IMAGES OF THE DAY
Britain's Kate, Duchess of Cambridge and Prince William ride in the front of a boat as they watch the America's Cup World Series Race, on the Solent, in Portsmouth, Britain July 24, 2016. REUTERS/Tim Ireland/Pool
Catherine, Duchess of Cambridge (L), steers a dragon boat as she races against her husband Prince William on a lake in Dalvay-by-the Sea, Prince Edward Island July 4, 2011. REUTERS/John Stillwell/Pool (CANADA - Tags: ROYALS SOCIETY POLITICS ENTERTAINMENT)
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