The royals are all set to welcome new a member in their family.
It has been announced that Prince William and Kate, the Duke and Duchess of Cambridge, are expecting their third child.
The official announcement was made on Twitter by the Kensington Palace.
The Duke and Duchess of Cambridge are very pleased to announce that The Duchess of Cambridge is expecting their third child pic.twitter.com/DZCheAj1RM— Kensington Palace (@KensingtonRoyal) September 4, 2017
On their official Twitter handle, they wrote, "Their Royal Highnesses the Duke and Duchess of Cambridge are very pleased to announce that the Duchess of Cambridge is expecting their third child. The Queen and members of both families are delighted with the news. As with her previous two pregnancies, the Duchess is suffering from hyperemesis gravidarum."
Read the press release in full ↓ pic.twitter.com/vDTgGD2aGF— Kensington Palace (@KensingtonRoyal) September 4, 2017
The statement continued, "Her Royal Highness will no longer carry out her planned engagement at the Hornsey Road Children's Centre in London today. The Duchess is being cared for at Kensington Palace."
The couple, who married in 2011, already have two children.
Their first, Prince George, was born on July 22 2013, and their second, Princess Charlotte, was born on May 2 2015.
Kensington Palace, however, didn't reveal when the baby was due.