Pippa Middleton and her husband James Matthews have welcomed their first child together – a baby boy.

Pippa, who is the sister of Britain's Duchess of Cambridge, Kate Middleton, gave birth to her son on Monday afternoon, with the baby weighing 8lbs 9oz.

The baby's aunt and uncle Prince William and Kate are "thrilled" at the news, according to a spokesperson for Kensington Palace.

James Matthews and Pippa Middleton at Princess Eugenie's wedding

Pippa and James, who is the older brother of Vogue Williams' husband Spencer Matthews, were most recently seen at the wedding of Princess Eugenie and Jack Brooksbank, which took place in St. George's Chapel in Windsor on Friday.

The news of their son's birth comes just a day after Kensington Palace announced that Duchess of Sussex Meghan Markle is expecting her first child with Prince Harry.

Meghan and Harry are currently in Australia on their first overseas tour since their trip to Ireland earlier this year.

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