Kate Middleton and Prince William are reportedly expecting their fourth baby.

The Duke and Duchess of Cambridge are already parents to three adorable royal children Prince George, Princess Charlotte and Prince Louis. However, fans are still expecting them to make another baby announcement and they may do so soon.

“William and Kate are expecting their fourth child,” a palace source told OK! Magazine.

The insider also revealed a surprising detail about Middleton’s rumored fourth pregnancy. The Duke and Duchess of Cambridge reportedly determined their baby’s gender.

“It’s a girl. With their first three children, Kate and Wills wanted it to be a surprise but this time they thought it would be fun to enjoy the planning process… so they decided to buck tradition and learn the sex.”

The publication claimed that Prince William and Middleton aren’t ready to make an official announcement yet. However, they have already shared the news with their friends and family.

Queen Elizabeth II is reportedly “thrilled” for the Cambridges’ upcoming addition and loves the fact that “history is repeating itself.” Queen Elizabeth II and Prince Philip have four children.

The source added that unlike her first three pregnancies, she is not experiencing morning sickness yet and her cravings have changed. She can’t get enough of “spicy foods.” Meanwhile, Prince William goes of his way to ensure that Middleton gets everything she wants.

New Idea reported earlier that the Duke and Duchess of Cambridge are expecting a baby girl. There are talks that Middleton is expecting and “all signs suggest that an official announcement from Kensington Palace is imminent.“

Princess Charlotte has reportedly been asking for a sister to play with. Also, Middleton sees Princess Charlotte and Prince George’s bond and she wants Prince Louis to have a sister close to his age, too. Phil Dampier is also convinced that the Duke and Duchess of Cambridge are likely to have a new addition to their family.

“I always thought Kate wanted to have three children because she comes from a family of three siblings, but now I’m convinced she’s delighted to have four,” Dampier said.

Kate Middleton and Prince William
Prince William and Kate Middleton attend the 1st Battalion Irish Guards St Patrick's Day Parade at Cavalry Barracks on March 17, 2019 in Hounslow, England. Getty Images/Gareth Fuller