Peppa Pig and her little brother, George, have welcomed a little sister as Mummy Pig gives birth to her third piglet.

Good Morning Britain revealed the family had welcomed their second daughter, Evie, named after Mummy Pig’s aunty, on Tuesday morning UK time ahead of the next season of the hugely popular children’s TV cartoon series.

Presenter Richard Arnold broke the news saying more than 60 million viewers “have been following Mummy Pig and the rest of the pig family while they get ready to welcome their new addition”.

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Evie’s birth comes after the surprise pregnancy announcement in February and a gender reveal celebration in London last month.

According to Good Morning Britain, Evie arrived at 5.34am in the Lindo Wing of St Mary’s Hospital in Paddington, UK.

That is the same maternity ward where Catherine, Princess of Wales gave birth to her three children, Prince George, Princess Charlotte, and Prince Louis.

The exclusive ward can cost from £5,900 ($A12,301) for just one night, rising to £7,500 ($A15,637) for deluxe packages.

“It’s a beautiful thing, she’s certainly receiving the royal treatment so far,” Arnold said of the cartoon birth.

In posts to the official Peppa Pig social media accounts, Mummy Pig and Daddy Pig also made their “royal appearance” outside the hospital steps with baby Evie in their arms.

The birth was also announced with a town crier scroll-style proclamation as well as a special birth certificate plaque on a pink stand.

Arnold said viewers can see Peppa’s reaction to her new baby sister in new episodes of the cartoon series due to air in coming months.