Meghan, the Duchess of Sussex, is expecting her first child with Prince Harry, Kensington Palace announced Monday.
The announcement comes five months after the couple wed in a star-studded ceremony at Windsor Castle. The palace has said the baby is expected in the spring of 2019. Britain's Queen Elizabeth II will be the child's great-grandmother.
The palace said the couple has "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 announcement comes as Harry and the former Meghan Markle arrived in Sydney at the start of a 16-day visit to Australia, Fiji, Tonga and New Zealand.
The trip officially begins on Tuesday and will see the couple watch the Invictus Games, visit a Sydney zoo and visit the rural Flying Doctor service.