Pippa Middleton and her husband welcome a baby boy!

Pippa Middleton and her husband James Matthews have finally had their first child!

They welcomed a little baby boy, who weighed 8lbs. 9oz.

A representative for Pippa told PEOPLE magazine that "everyone is delighted and mother and baby are doing well."

Pippa and James were spotted arriving at the Lindo Wing at St Mary’s Hospital in Paddington, London yesterday, the same private birthing unit that her older sister the Duchess of Cambridge gave birth into her three children.

The Duchess of Cambridge is reportedly "thrilled" with the arrival of her new nephew.

Kensington Palace announced in a statement on behalf of Kate and her husband Prince William that "the Duke and Duchess of Cambridge are thrilled for Pippa and James."

READ MORE: 

• Pippa Middleton shows off her baby bump at Eugenie's wedding 

There has been no word on what Pippa and James have decided to name their darling newborn, but despite being cousins with Prince George, Princess Charlotte and Prince Louis, Pippa’s baby boy will not receive a royal title as he – like his parents – is not technically a part of the royal family.

We're sure he will still receive a lot of hand-me-downs from his royal cousins, as new Aunty Kate loves to recycle their adorable outfits.

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• Meghan Markle's heartfelt tribute to Princess Diana in Australia 

Congratulations, Pippa and James!