Kate Middleton's Sister Pippa Welcomes 3rd Child With Husband James Matthews

Pippa Middleton and her husband James Matthews welcomed their third baby, making them a family of five.

Kate Middleton's younger sister delivered her youngest child — a baby girl — a couple of weeks ago in the Lindo Wing of St. Mary's Hospital in London, People reported. This was the same hospital where the Duke and Duchess of Cambridge welcomed their three children — Prince George, 8, Princess Charlotte, 7, and Prince Louis, 4.

Pippa, 38, and Matthews, 46, are also parents to son Arthur, 3, and daughter Grace, 1.

Pippa made headlines back in June when she was spotted with a baby bump at the star-studded "Party at the Palace" concert in London as part of the four-day festivities of Queen Elizabeth's Platinum Jubilee.

At the time, she was joined by her husband, her brother James Middleton and his wife Alizée Thévenet.

Pippa's third child is Carole and Michael Middleton's sixth grandchild. Her three kids could enjoy more playdates with their royal cousins in the future because her family and the Cambridges are both planning to move to a village near Bucklebury, in Berkshire, where Pippa and her siblings grew up and where their parents still live, an unnamed source told People.

According to the insider, Pippa and Matthews' new home will be about 50 minutes from Windsor, which is where Prince William and Duchess Kate are relocating this summer with their children.

Royal expert Ingrid Seward, author of "Prince Philip Revealed: A Man of His Century," recently weighed in on the Cambridges' reported move and said she believes it will give the family more freedom than they have in their current home, Apartment 1 at London's Kensington Palace.

"I think what William and Catherine will have for their children is the freedom they didn't have at Kensington Palace," the royal biographer said on True Royal TV's "The Royal Beat." "I remember Harry saying to a friend of mine that Catherine was almost a prisoner at Kensington Palace. And I thought, 'Don't be ridiculous, it's the most gorgeous place to live in London!'"

Seward added, "Then I thought, in a way they are prisoners. They have a beautiful house and garden, but beyond that garden are hundreds of people every day and massive security."

An anonymous source told Us Weekly that Prince William and Middleton considered their three children when making the decision to move. Princess Charlotte can go horse riding in the open air, while Prince George can play football and Prince Louis can start tennis lessons in Windsor, the insider said.

"They're starting over there, and George, Charlotte and Louis are really excited about going to a new school and being in the countryside in the fresh air where there's lots of space for them to play freely," the source said.

The Cambridges' new home will be closer to Windsor Castle, where Queen Elizabeth has been living since the pandemic began in 2020. The 96-year-old monarch decided to make it her permanent residence earlier this year.