And theRoyal Fab 4are soon to be five!

Princess KateandPrince Williamare expecting their third child together, Kensington Palace confirmed today. The royals are already parents to 4-year-oldPrince Georgeand 2-year-oldPrincess Charlotte.

“Their Royal Highnesses The Duke andDuchess of Cambridgeare very pleased to announce that The Duchess of Cambridge is expecting their third child,” a statement from Kensington Palace, released Monday morning, said.

“The Queen and members of both families are delighted with the news.”

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Royals visit the Princess Diana memorial garden, Kensington Gardens, London, UK - 30 Aug 2017

During her first two pregnancies,Kate, 35, battledacute morning sickness, also known as Hyperemesis Gravidarum. She is also afflicted with the condition during this pregnancy, according to the statement.

As a result, she canceled a planned appearance Monday morning.

“As with herprevious two pregnancies, The Duchess is suffering from Hyperemesis Gravidarum. Her Royal Highness will no longer carry out her planned engagement at the Hornsey Road Children’s Centre in London today,” the statement said.

“The Duchess is being cared for at Kensington Palace.”

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The Duke And Duchess Of Cambridge Visit Germany - Day 3

Kate is understood to be less than three months pregnant – the palace made the announcement early because of her illness. Last time, when she was pregnant withPrincess Charlotte, Kate was also cared for at home at Apartment 1A of the palace.

The birth will relegatePrince Harry– who is visiting Manchester today – down to sixth in line to the throne.

During an appearance Monday,Harry told reportersthe news is" “fantastic, great. Very, very happy for them.” Asked about Kate he added, “I haven’t seen her for a while but I think I she’s okay.”

The announcement comes in a landmark week for the family. On Thursday, she and Prince William are set to takePrince Georgeto school for his first day atThomas’s Battersea.

The newest royal will be joining an adorable set of siblings. George and Charlotte have been charming people around the world since their respective births — including on the family’sfall 2016 tour of Canadaand onChristmas Day in Kate’s hometown of Bucklebury.

The royal brother and sister had a blast this past September duringa playdateon the Canadian tour that saw George discovering the joy of bubbles andCharlotte speaking her first words in public.

source: people.com