Kate Middleton and Prince William Commemorate King Charles' 74th Birthday

Since becoming king in September, King Charles' first birthday is Monday.

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King Charles III's birthday!

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Monday's social media post from Prince William and Kate Middleton celebrated the monarch's 74th birthday. ʼ

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The message wished the King a happy birthday with a photo of him smiling.

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The photo was shot during his recent trip to Yorkshire, where he visited the Morrisons Supermarkets headquarters to learn more about the supermarket hub's apprenticeship programs and sustainability initiatives.

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Buckingham Palace tweeted another smiling snapshot of Charles and a look behind the scenes of London tributes on Monday to wish him a happy birthday.

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The King's Troop Royal Horse Artillery fired cannons in Green Park around lunchtime, while the Household Cavalry Band performed an epic "Happy Birthday" during the Changing the Guard ceremony outside Buckingham Palace.

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