Prince Harry and Meghan Markle are expecting their first baby, Kensington Palace has confirmed.

The couple, who have just landed in Australia for a 16-day royal tour of Oz, Fiji, Tonga and New Zealand, are expected to welcome the little one in Spring 2019.

A spokesperson said: “Their Royal Highnesses The Duke and Duchess of Sussex are very pleased to announce that The Duchess of Sussex is expecting a baby in the Spring of 2019.

RELATED: Prince Harry And Meghan Markle’s Tour Down Under, 76 Royal Engagements In 16 Days

“Their Royal Highnesses have appreciated all of the support they have received from people around the world since their wedding in May and are delighted to be able to share this happy news with the public.

“The Queen, Duke of Edinburgh, Prince of Wales, Duchess of Cornwall and the Duke Duke and Duchess of Cambridge are delighted for the couple and were able to congratulate them on Friday at the wedding in person.”

Meghan’s mom, Doria Ragland, added to ET in a statement: “Ms. Ragland is very happy about this lovely news, and she looks forward to welcoming her first grandchild.”

RELATED: Meghan Markle’s Dad Has Reportedly Met Prince Harry Face-To-Face

The Duchess of Sussex, 37, is believed to be around 12 weeks pregnant. The baby boy or girl will be seventh in line to the throne after Harry, 34, Prince George, five, Princess Charlotte, three and Prince Louis, five months.

The royals were bombarded with congratulatory messages on Twitter after the Palace broke the news on Monday morning.

See some of the online reaction below:

Harry and Meghan are now set to continue their Australian royal tour, with them heading to Taronga Zoo in Sydney before travelling to Tonga to have a dinner with King Tupou VI and Queen Nanasipau’u.

They’ll then attend Sydney’s Invictus Games, with Meghan also embarking on some solo engagements during the tour.

The pair will return home to London on Oct. 31.