Kate Middleton's sister, Pippa just announced the birth of her baby boy! The royal family is happy to welcome the new addition to the extended family. This is Pippa Middleton and her husband James Matthews first child. 

A royal correspondent tweeted the news, writing, "George, Charlotte and Louis have a new cousin! James and Pippa Matthews (Middleton) have had a baby boy. He was born Monday 15th October at 1.58pm, weighing 8lb and 9oz. Everyone is delighted and Mother and baby are doing well." 

George, Charlotte and Louis have a new cousin! James and Pippa Matthews (Middleton) have had a baby boy.
He was born Monday 15th October at 1.58pm, weighing 8lb and 9oz.
Everyone is delighted and Mother and baby are doing well.

— Rebecca English (@RE_DailyMail) 16 October 2018

It is baby season for the royal family. News of Pippa Middleton's son's birth comes just one day after Duchess of Sussex Meghan Markle announced her pregnancy with Prince Harry. 

Congratulations to Pippa Middleton and James Matthews!