Pippa Middleton has given birth to a baby girl

• Pippa Middleton gave birth to her second child with her husband James Matthews.
• The baby girl, Grace Elizabeth Jane Matthews, shares a middle name with her aunt Kate Middleton.
• A representative for Middleton confirmed that both "mother and baby are doing well."

Pippa Middleton gave birth to her second child, a baby girl, on Monday morning.

Pippa, whose sister is the Duchess of Cambridge, and her husband James Matthews welcomed the new arrival to their family, making their 2-year-old son Arthur Michael William an older brother.

"I'm delighted to confirm, Grace Elizabeth Jane was born around 4:22 am this morning, weighing 6lbs 7oz," a representative for Middleton confirmed to Insider.

"Mother and baby are doing well," they added.

Grace is a cousin of Prince George, Princess Charlotte, and Prince Louis, alongside her brother and Archie Harrison, son of the Duke and Duchess of Sussex.

She is also Prince William and Kate's first niece, and the fifth grandchild to Carole and Michael Middleton.

The newborn's name includes a nod to her aunt Catherine Elizabeth Middleton, as the pair share a middle name.

This is not the first time the couple has chosen a middle name with sentimental links to family members -- Arthur's middle name is a tribute to Matthews' late brother Michael Matthews, who passed away while climbing Mount Everest in 1999.

Pippa, 37, and Matthews, 45, were married in 2017 and welcomed Arthur in October 2018 at the Lindo Wing of St. Mary's Hospital in London, where her sister Kate delivered all three of her children.

Alongside the Middletons, Princess Diana also gave birth at the $7,400 per night facility, making the Lindo Wing a popular choice for royal births.

Pippa used her fitness column at Waitrose Weekend magazine to confirm her first pregnancy in 2018, and shared insights into her pregnancy experience, writing: "I've noticed my body change and weight increase, but through effective exercise and sports I feel that it's being strengthened to support a healthy pregnancy, birth, and recovery."

Her mother Carole confirmed her daughter's pregnancy news during an interview with Good Housekeeping in March.

"I hope to see more of my family than I could last year, including, of course, my new grandchild," she told the magazine.

With Princess Eugenie giving birth to her first child, a baby boy, in February, and the news that Prince Harry and Meghan Markle are expecting a baby girl this summer, 2021 has been a big year for babies related to senior members of the royal family.