Kate Middleton and Prince William
Prince William and his wife Kate Middleton are expecting their third child together. In this photo, the royal couple appeared with their daughter, Charlotte Elizabeth Diana, outside the Lindo Wing of St. Mary’s Hospital in London on May 2, 2015. Reuters/Cathal McNaughton

The royal family is growing! Prince William and his wife, Kate Middleton, just announced their happiness as they are now expecting their third baby.

The Kensington Palace made the announcement on Monday morning by releasing a statement. “The Queen and members of both families are delighted with the news,” the statement reads.

However, Middleton had to take extra precautions with her health since she is suffering from acute morning sickness, also known as Hyperemesis Gravidarum. She experienced the same thing during her pregnancies with Prince George and Princess Charlotte.

Because of her morning sickness, Middleton had to cancel her event at the Hornsey Road Children’s Centre, which was scheduled on Monday.

According to ET Online, the royal couple’s pregnancy announcement coincided with 4-year-old Prince George’s preparation to start school at Thomas’ Battersea in London on Sept. 7. His parents have planned to accompany him on his first day of school.

It has earlier been reported that Middleton and her sister, Pippa, planned on getting pregnant at the same time. Pippa married hedge fund manager James Matthews just this May, and a source told Us Weekly that “they would love to be pregnant soon.”

“It’s long been a dream for Kate and Pippa to be pregnant at the same time,” the family friend revealed. “To share that would be amazing.”

It would also help Pippa to experience pregnancy with her elder sister because “Kate has so much knowledge to share. She’s a walking baby encyclopedia at this point,” the source said.

Middleton has joked about her third pregnancy for some time now, and even said in public that she and her husband “will just have to have more babies” since they received tons of adorable toys designed for newborn babies.

Royal correspondent Victoria Murphy shared the sweet moment on Twitter, but later downplayed the rumors that Middleton was pregnant at the time.

“Could this be their way of saying that they will have more children?” a curious netizen asked. Murphy responded: “I actually think the opposite! I expect she joked about it because it's not something they're serious about but never say never!”