The duke and duchess paid their respects with a surprise visit to New Zealand House.
The royals stepped out on Sunday to attend the christening of Harry's goddaughter, Lena Tindall.
The 10-bedroom cottage will reportedly include an eco-friendly green energy unit.
ET has reached out to Kensington Palace, which has no comment.
The Duke and Duchess of Sussex are expecting their first child next month!
During an interview with 'Good Morning Britain,' the 57-year-old actor opened up about why he spoke out in defense of the Dutchess.
The 57-year-old actor described the Duchess of Sussex as 'kind and smart and intelligent.'
The Duke and Duchess of Sussex's news comes as the two prepare for the arrival of their first child together.
ET's royal source says the Duchess of Sussex is looking to friends for advice during this new chapter.
With her due date reportedly coming up, the duchess' schedule is about to change.
ET's royal source says the duchesses have reportedly made a private pact for sake of appearances.
ET's Senior Style Editor, Marisa Runyon, breaks down the Duchess of Sussex's latest maternity looks.
Take a look at the duchess' reunion!
From New York City to Hollywood and everywhere in-between, see how the A-listers are living it up this month!
