A source close to the family said: 'Everyone is delighted and mother and baby are doing well'.
Unlike her sister Kate, who famously grappled with the serious morning sickness condition Hyperemesis Gravidarum, Pippa didn't have morning sickness at all. It's the same hospital where her older sister Catherine gave birth to her three kids, E!
The news came just hours after Prince Harry and Meghan announced they were expecting their first child, after arriving in Australia ahead of their royal tour.
Pippa was last spotted in public at the royal wedding of Princess Eugenie to Jack Brooksbank on Friday 12th October with a blossoming baby bump.
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What is the Lindo Wing? A suite, where Kate is believed to have given birth, is thought to cost closer to £7,500.
James and Pippa Matthews (Middleton) have had a baby boy.
How much does the baby weigh?
Middleton and Matthews have visited the Paddington-based hospital several times over the past few months, with the expectant mum's last visit being just last week. And, the mum to be previously revealed in her column that she is keeping up her fitness regime throughout and is particularly enjoying swimming. As a result, one of the biggest changes is that my lower body has tightened up.
At first, Pippa played coy about the rumors of her pregnancy.