Pippa Middleton and her husband James Matthews. Picture: Reuters

British socialite and author Pippa Middleton and her husband James Matthews have welcomed their first child into the world and both mother and baby are doing well.

A representative for the couple said: "Everyone is delighted and mother and baby are doing well."

The baby boy — whose name has yet to be released to the public — was born at 1.58pm on Monday, weighing 8lb and 9oz. The baby arrived at the Lindo Wing of St. Mary’s Hospital, the same place where her sister Duchess Catherine gave birth to her three children.

Pippa sparked speculation she was due to give birth any time soon when she was spotted heading into the Lindo Wing on Monday.

Pippa confirmed she was expecting her first child back in June.

Meanwhile, Meghan and Prince Harry, the Duke and Duchess of Sussex, on Monday announced that they  were expecting their first child.