King Charles receives a special birthday message from Prince William and Princess Kate.

Cheers to King Charles' birthday!

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In honor of King Charles' 74th birthday, which was on Monday, the Prince and Princess of Wales have paid tribute to him.

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Princess Kate and the Queen Consort make a somber entrance at the Remembrance Day service.

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Wishing His Majesty The King a very happy birthday was written alongside a picture of the monarch taken during a recent engagement on the royal couple's official Twitter account.

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The picture was shot earlier this month when Charles and Queen Consort Camilla visited the Bradford headquarters of Morrisons Supermarkets.

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Why the royal family felt the Remembrance Festival this year was particularly special

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10 never-before-seen images of King Charles loving on his sons William and Harry as infants

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King Charles will likely celebrate his 74th birthday in seclusion. After the Queen passed away on September 8th, he was crowned king and has since been quite busy.

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As Prince of Wales, William occasionally spent his birthday abroad on official business and would celebrate it with a cake.

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