THE Duke and Duchess of Cambridge have named their baby son Louis Arthur Charles.

The couple’s third child, who was born on Monday, April 23 at 11.01am, weighing 8lb 7oz, will be known as Prince Louis, Kensington Palace announced after a four-day wait.

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The Palace said in a short statement: “The Duke and Duchess of Cambridge are delighted to announce that they have named their son Louis Arthur Charles.

“The baby will be known as His Royal Highness Prince Louis of Cambridge.”