Meghan, Duchess of Sussex and Prince Harry, Duke of Sussex make an official visit to the Joff Youth Centre in Peacehaven, Sussex on October 3, 2018 in Peacehaven, United Kingdom.
A statement from Kensington Palace said the baby is expected in the spring of 2019.
No other details regarding the child's sex or anticipated birthdate were immediately available. That speculation intensified when she was seen clutching two large folders in front of her stomach as she arrived in Sydney for the 16-day trip to Australia, Fiji, Tonga and New Zealand.
Prince Harry, Duke of Sussex and Meghan, Duchess of Sussex leave Windsor Castle in the Ascot Landau carriage during a procession after getting married at St Georges Chapel on May 19, 2018 in Windsor, England.
Meghan, 37, made her name in acting as savvy para-legal Rachel Zane in the USA television legal drama "Suits".
British media last month commented on her closing her own vehicle door at her first solo engagement - the opening of an exhibition at the Royal Academy of Arts in London. Britain's Queen Elizabeth II will be the child's great-grandmother.