Harry and Meghan are preparing to welcome a brother or sister for their son Archie Mountbatten-Windsor, who turned one last May.
A spokesperson for the couple said they were “overjoyed” at the news.
The couple shared a black and white picture of themselves under a tree, with Harry resting his hand on Meghan’s head as she cradles her bump.
A spokesperson for the Duke and Duchess of Sussex said: “We can confirm that Archie is going to be a big brother.
“The Duke and Duchess of Sussex are overjoyed to be expecting their second child.”
Misan Harriman, a friend of the Duke and Duchess of Sussex and the photographer who took the photo that accompanied their pregnancy announcement, tweeted: “Meg, I was there at your wedding to witness this love story begin, and my friend, I am honoured to capture it grow”.
Presumably, they will be taking legal action over this flagrant intrusion into their private lives?