Prince William and Kate Middleton are getting ready to add a brand-new addition to their family as they welcome baby number three.

What's The Sex?

While the Duke and Duchess of Cambridge are beyond thrilled to welcome their latest bundle of joy into the family, they are still in the dark regarding the child's sex. A source close to Prince Williams and Middleton told E! News that they have no idea if they are expecting another boy or girl. Also, the lack of knowledge of the child's sex has made their final preparations difficult.

A Royal Title

As Prince William and Middleton prepare to welcome Prince George and Princess Charlotte's little sibling, the newborn is expected to receive quite the Royal Title. Town & Country revealed that the Royal Baby would receive the titles of His/Her Royal Highness Prince/Princess of the United Kingdom of Great Britain and Northern Ireland. The soon-to-be-born baby will be the fifth in line for the throne succession.

A 'Wet' Hint

Reports have indicated that Middleton is expected to give birth to her child sometime in April. It is expected that the Duchess of Cambridge will deliver at the Lindo Wing of the St. Mary's Hospital in London, England. Many royal watchers believe that Middleton will give birth there because a photo of the hospital has been circulating across the United Kingdom and the internet with a "Wet Paint" sign on the railings. St. Mary's Hospital has quite the history with the Royal Family. Middleton gave birth to Prince Charlotte at the hospital in 2015, and her older brother in 2013. Also, Princess Diana gave birth to both Princes William and Harry at the hospital in the 1980s.

In The Kitchen

The new royal baby will be hanging out in Kensington Palace's kitchen when they join their siblings and their parents at their home. The Duchess of Cambridge revealed that both 4-year-old George and 2-year-old Charlotte have a passion for creating mini messes in the kitchen. Middleton added that both siblings enjoy creating pizza and have picked up a few Spanish words from their nanny, Maria Teresa Turrion Borrallo.

The Future Sister-In-Law

In addition to the new sibling, Prince William and Middleton will be welcoming Prince Harry's girlfriend, former Suits actress Meghan Markle to the family. While she has been preparing to adapt to the Royal Family, it has been reported that the newest member of the Royal Family has been visiting Middleton for tea. She has also offered Middleton tips regarding a healthy lifestyle.