George, Louis and Charlotte smile big in unseen royal photo with dad William

It's all smiles for the Cambridge children! 

The British Army helped ring in Prince George's sixth birthday on Monday, July 22nd with a previously unseen photo of the royal. The snapshot, which was shared to Twitter, shows George standing alongside sister Princess Charlotte, father Prince William and baby brother Prince Louis at the King Power Royal Charity Polo Day two weeks ago. 

The family is joined by representatives of the army and Domhnall, the Wolfhound mascot for the Irish Guards, who is as big as Charlotte! 

"The Army In London, including @irish_guards Wolfhound mascot Domhnall, is wishing HRH Prince George a very happy 6th birthday today. Our Soldiers are always on duty, ready to serve! #PrinceGeorge" the army wrote on Twitter. 

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Royals celebrate Prince George's 6th birthday
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Royals celebrate Prince George's 6th birthday
🦁🦁🦁 Happy Birthday Prince George! The Duke and Duchess of Cambridge are very pleased to share new photographs of Prince George to mark His Royal Highness's sixth birthday. This photograph was taken recently in the garden of their home at Kensington Palace by The Duchess of Cambridge. Thank you everyone for all your lovely messages!
🎂 Happy Birthday Prince George! The Duke and Duchess of Cambridge are very pleased to share new photographs of Prince George to mark His Royal Highness's sixth birthday. This photograph was taken on holiday with the family by The Duchess of Cambridge. Thank you everyone for all your lovely messages!
🎈⚽️ Happy Birthday Prince George! The Duke and Duchess of Cambridge are very pleased to share new photographs of Prince George to mark His Royal Highness's sixth birthday. This photograph was taken recently in the garden of their home at Kensington Palace by The Duchess of Cambridge. Thank you everyone for all your lovely messages!
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The royal tot reportedly celebrated his big day on a family trip to the private island of Mustique for the second year in the row. One of the photos released by the palace was captured by the Duchess of Cambridge during their trip.

It's been rumored that Kate and William are also throwing him a magic-themed bash at Kensington Palace with his school friends upon their return from holiday. 

“The Duke and Duchess of Cambridge have gone all out to organize a birthday party for George,” said an insider to Us Magazine. In addition to a magician, the fun-filled day will also include cupcakes, ice cream and a bounce house!

For more on the royal's big day, watch the video above.  

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Meghan Markle and Kate Middleton attend polo match with kids
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Meghan Markle and Kate Middleton attend polo match with kids
WOKINGHAM, ENGLAND - JULY 10: Meghan, Duchess of Sussex and Archie Harrison Mountbatten-Windsor attend The King Power Royal Charity Polo Day at Billingbear Polo Club on July 10, 2019 in Wokingham, England. (Photo by Samir Hussein/WireImage)
WOKINGHAM, ENGLAND - JULY 10: Meghan, Duchess of Sussex and Archie Harrison Mountbatten-Windsor, Catherine, Duchess of Cambridge and Prince Louis attend The King Power Royal Charity Polo Day at Billingbear Polo Club on July 10, 2019 in Wokingham, England. (Photo by Samir Hussein/WireImage)
WOKINGHAM, ENGLAND - JULY 10: Catherine, Duchess of Cambridge and Prince Louis attend The King Power Royal Charity Polo Day at Billingbear Polo Club on July 10, 2019 in Wokingham, England. (Photo by Samir Hussein/WireImage)
WOKINGHAM, ENGLAND - JULY 10: Prince George and Princess Charlotte attend The King Power Royal Charity Polo Day at Billingbear Polo Club on July 10, 2019 in Wokingham, England. (Photo by Samir Hussein/WireImage)
WOKINGHAM, ENGLAND - JULY 10: Meghan, Duchess of Sussex, Archie Harrison Mountbatten-Windsor and Prince George of Cambridge attend The King Power Royal Charity Polo Day at Billingbear Polo Club on July 10, 2019 in Wokingham, England. (Photo by Samir Hussein/WireImage)
Britain's Kate, Duchess of Cambridge runs after her son Prince Louis, at the Royal Charity Polo Day at Billingbear Polo Club, Wokingham, England, Wednesday, July 10, 2019. (Andrew Matthews/PA via AP)
WOKINGHAM, ENGLAND - JULY 10: Meghan, Duchess of Sussex and Archie Harrison Mountbatten-Windsor, Catherine, Duchess of Cambridge and Prince Louis attend The King Power Royal Charity Polo Day at Billingbear Polo Club on July 10, 2019 in Wokingham, England. (Photo by Samir Hussein/WireImage)
WOKINGHAM, ENGLAND - JULY 10: Meghan, Duchess of Sussex, Archie Harrison Mountbatten-Windsor and Prince George of Cambridge attend The King Power Royal Charity Polo Day at Billingbear Polo Club on July 10, 2019 in Wokingham, England. (Photo by Samir Hussein/WireImage)
WOKINGHAM, ENGLAND - JULY 10: Prince Harry, Duke of Sussex, Meghan, Duchess of Sussex and Prince Archie Harrison Mountbatten-Windsor attend The King Power Royal Charity Polo Day at Billingbear Polo Club on July 10, 2019 in Wokingham, England. (Photo by Chris Jackson/Getty Images)
WOKINGHAM, ENGLAND - JULY 10: Prince George and Princess Charlotte attend The King Power Royal Charity Polo Day at Billingbear Polo Club on July 10, 2019 in Wokingham, England. (Photo by Samir Hussein/WireImage)
Britain's Kate, Duchess of Cambridge and Prince Louis attend the Royal Charity Polo Day at Billingbear Polo Club, Wokingham, England, Wednesday, July 10, 2019. (Andrew Matthews/PA via AP)
WOKINGHAM, ENGLAND - JULY 10: Meghan, Duchess of Sussex and Archie Harrison Mountbatten-Windsor attend The King Power Royal Charity Polo Day at Billingbear Polo Club on July 10, 2019 in Wokingham, England. (Photo by Samir Hussein/WireImage)
WOKINGHAM, ENGLAND - JULY 10: Meghan, Duchess of Sussex and Archie Harrison Mountbatten-Windsor, Catherine, Duchess of Cambridge and Prince Louis attend The King Power Royal Charity Polo Day at Billingbear Polo Club on July 10, 2019 in Wokingham, England. (Photo by Samir Hussein/WireImage)
The Duchess of Sussex holding her son Archie watched the Duchess of Cambridge as they attend the King Power Royal Charity Polo Day at Billingbear Polo Club, Wokingham, Berkshire. (Photo by Andrew Matthews/PA Images via Getty Images)
WOKINGHAM, ENGLAND - JULY 10: Prince George and Princess Charlotte attend The King Power Royal Charity Polo Day at Billingbear Polo Club on July 10, 2019 in Wokingham, England. (Photo by Samir Hussein/WireImage)
The Duke and Duchess of Sussex with their son Archie as they the King Power Royal Charity Polo Day at Billingbear Polo Club, Wokingham, Berkshire. (Photo by Andrew Matthews/PA Images via Getty Images)
WOKINGHAM, ENGLAND - JULY 10: Meghan, Duchess of Sussex and Archie Harrison Mountbatten-Windsor attend The King Power Royal Charity Polo Day at Billingbear Polo Club on July 10, 2019 in Wokingham, England. (Photo by Samir Hussein/WireImage)
The Duchess of Sussex holding her son Archie as they attend the King Power Royal Charity Polo Day at Billingbear Polo Club, Wokingham, Berkshire. (Photo by Andrew Matthews/PA Images via Getty Images)
WOKINGHAM, ENGLAND - JULY 10: Prince Harry, Duke of Sussex, Meghan, Duchess of Sussex and Prince Archie Harrison Mountbatten-Windsor attend The King Power Royal Charity Polo Day at Billingbear Polo Club on July 10, 2019 in Wokingham, England. (Photo by Chris Jackson/Getty Images)
WOKINGHAM, ENGLAND - JULY 10: Meghan, Duchess of Sussex and Archie Harrison Mountbatten-Windsor attend The King Power Royal Charity Polo Day at Billingbear Polo Club on July 10, 2019 in Wokingham, England. (Photo by Samir Hussein/WireImage)
WOKINGHAM, ENGLAND - JULY 10: Catherine, Duchess of Cambridge, Prince Louis, Prince George and Princess Charlotte attend The King Power Royal Charity Polo Day at Billingbear Polo Club on July 10, 2019 in Wokingham, England. (Photo by Samir Hussein/WireImage)
WOKINGHAM, ENGLAND - JULY 10: Meghan, Duchess of Sussex and Archie Harrison Mountbatten-Windsor attend The King Power Royal Charity Polo Day at Billingbear Polo Club on July 10, 2019 in Wokingham, England. (Photo by Samir Hussein/WireImage)
WOKINGHAM, ENGLAND - JULY 10: Meghan, Duchess of Sussex and Archie Harrison Mountbatten-Windsor, Catherine, Duchess of Cambridge and Prince Louis attend The King Power Royal Charity Polo Day at Billingbear Polo Club on July 10, 2019 in Wokingham, England. (Photo by Samir Hussein/WireImage)
The Duchess of Sussex holding her son Archie as they attend the King Power Royal Charity Polo Day at Billingbear Polo Club, Wokingham, Berkshire. (Photo by Andrew Matthews/PA Images via Getty Images)
Britain's Kate, Duchess of Cambridge and Prince Louis attend the Royal Charity Polo Day at Billingbear Polo Club, Wokingham, England, Wednesday, July 10, 2019. (Andrew Matthews/PA via AP)
WOKINGHAM, ENGLAND - JULY 10: Prince Harry, Duke of Sussex, Meghan, Duchess of Sussex and Prince Archie Harrison Mountbatten-Windsor attend The King Power Royal Charity Polo Day at Billingbear Polo Club on July 10, 2019 in Wokingham, England. (Photo by Chris Jackson/Getty Images)
WOKINGHAM, ENGLAND - JULY 10: Prince Harry, Duke of Sussex, Meghan, Duchess of Sussex and Prince Archie Harrison Mountbatten-Windsor attend The King Power Royal Charity Polo Day at Billingbear Polo Club on July 10, 2019 in Wokingham, England. (Photo by Chris Jackson/Getty Images)
WOKINGHAM, ENGLAND - JULY 10: Meghan, Duchess of Sussex and Prince Archie Harrison Mountbatten-Windsor attend The King Power Royal Charity Polo Day at Billingbear Polo Club on July 10, 2019 in Wokingham, England. (Photo by Chris Jackson/Getty Images)
The Duchess of Sussex holding her son Archie watched the Duchess of Cambridge as they attend the King Power Royal Charity Polo Day at Billingbear Polo Club, Wokingham, Berkshire. (Photo by Andrew Matthews/PA Images via Getty Images)
The Duchess of Sussex holding her son Archie as they attend the King Power Royal Charity Polo Day at Billingbear Polo Club, Wokingham, Berkshire.
WOKINGHAM, ENGLAND - JULY 10: Prince George and Princess Charlotte attend The King Power Royal Charity Polo Day at Billingbear Polo Club on July 10, 2019 in Wokingham, England. (Photo by Samir Hussein/WireImage)
WOKINGHAM, ENGLAND - JULY 10: Prince George and Princess Charlotte attend The King Power Royal Charity Polo Day at Billingbear Polo Club on July 10, 2019 in Wokingham, England. (Photo by Samir Hussein/WireImage)
WOKINGHAM, ENGLAND - JULY 10: Catherine, Duchess of Cambridge, Prince Louis, Prince George and Princess Charlotte attend The King Power Royal Charity Polo Day at Billingbear Polo Club on July 10, 2019 in Wokingham, England. (Photo by Samir Hussein/WireImage)
WOKINGHAM, ENGLAND - JULY 10: Catherine, Duchess of Cambridge, Prince Louis, Prince George and Princess Charlotte attend The King Power Royal Charity Polo Day at Billingbear Polo Club on July 10, 2019 in Wokingham, England. (Photo by Samir Hussein/WireImage)
WOKINGHAM, ENGLAND - JULY 10: Catherine, Duchess of Cambridge, Prince Louis, Prince George and Princess Charlotte attend The King Power Royal Charity Polo Day at Billingbear Polo Club on July 10, 2019 in Wokingham, England. (Photo by Samir Hussein/WireImage)
WOKINGHAM, ENGLAND - JULY 10: Meghan, Duchess of Sussex and Prince Archie Harrison Mountbatten-Windsor attend The King Power Royal Charity Polo Day at Billingbear Polo Club on July 10, 2019 in Wokingham, England. (Photo by Chris Jackson/Getty Images)
WOKINGHAM, ENGLAND - JULY 10: Meghan, Duchess of Sussex, Archie Harrison Mountbatten-Windsor and Prince Harry, Duke of Sussex attend The King Power Royal Charity Polo Day at Billingbear Polo Club on July 10, 2019 in Wokingham, England. (Photo by Samir Hussein/WireImage)
WOKINGHAM, ENGLAND - JULY 10: Prince Harry, Duke of Sussex, Meghan, Duchess of Sussex and Prince Archie Harrison Mountbatten-Windsor attend The King Power Royal Charity Polo Day at Billingbear Polo Club on July 10, 2019 in Wokingham, England. (Photo by Chris Jackson/Getty Images)
WOKINGHAM, UNITED KINGDOM - JULY 10: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 24 HOURS AFTER CREATE DATE AND TIME) Catherine, Duchess of Cambridge and Prince Louis of Cambridge attend the King Power Royal Charity Polo Match, in which Prince William, Duke of Cambridge and Prince Harry, Duke of Sussex were competing for the Khun Vichai Srivaddhanaprabha Memorial Polo Trophy at Billingbear Polo Club on July 10, 2019 in Wokingham, England. (Photo by Max Mumby/Indigo/Getty Images)
WOKINGHAM, UNITED KINGDOM - JULY 10: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 24 HOURS AFTER CREATE DATE AND TIME) Catherine and Duchess of Cambridge and Prince Louis of Cambridge attend the King Power Royal Charity Polo Match, in which Prince William, Duke of Cambridge and Prince Harry, Duke of Sussex were competing for the Khun Vichai Srivaddhanaprabha Memorial Polo Trophy at Billingbear Polo Club on July 10, 2019 in Wokingham, England. (Photo by Max Mumby/Indigo/Getty Images)
WOKINGHAM, UNITED KINGDOM - JULY 10: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 24 HOURS AFTER CREATE DATE AND TIME) Catherine and Duchess of Cambridge and Prince Louis of Cambridge attend the King Power Royal Charity Polo Match, in which Prince William, Duke of Cambridge and Prince Harry, Duke of Sussex were competing for the Khun Vichai Srivaddhanaprabha Memorial Polo Trophy at Billingbear Polo Club on July 10, 2019 in Wokingham, England. (Photo by Max Mumby/Indigo/Getty Images)
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