Prince Georgeis almost 6!

As the future king prepares to blow out the candles on his cake on Monday, proud parentsKate MiddletonandPrince Williamhave released new photos of their birthday boy.

The third — which shows George in a different outfit, a green polo and striped shorts, as he smiles for a more candid moment — was taken while the royal family were on holiday. Kate and William traveled with their kids to theprivate Caribbean island of Mustique for the royal’s birthday.

The images are the latest addition to the Cambridge family’s special album of memories. William and Kate have issuedvarious portraitsof their children over the years to share with the public and thank fans for their birthday wishes.

Prince George.The Duchess of Cambridge

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The Duchess of Cambridge

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Kate Middleton, Prince Louis, Prince George and Princess Charlotte.Tim Rooke/Shutterstock

Catherine Duchess of Cambridge, Prince Louis, Prince George, Princess Charlotte

Prince George, Meghan Duchess of Sussex, Archie Mountbatten-Windsor

Kate took a seat on the grass with Louis as George and Charlotte, who wore theMarie-Chantal “Celina” dress, hung out together in the back of the car. “George seemed to be saying, ‘Charlotte pass me the sandwiches.’ Kate was asking Charlotte to pass little pots of food, and she also helped herself to food,” an onlooker told PEOPLE.

“They were having such fun going from stall to stall, playing on all the games,” a local villager says, adding: “George did pretty well at the ‘crockery smash’ stall. He looked very pleased with himself.”

source: people.com