Princess Eugenie and her husband, Jack Brooksbank, are expecting their first child early next year.
The news was announced on social media through the royal family's official accounts.
"Her Royal Highness Princess Eugenie and Mr Jack Brooksbank are very pleased to announce that they are expecting a baby in early 2021," a tweet posted by the royal family account read.
"The Duke of York and Sarah, Duchess of York, Mr and Mrs George Brooksbank, the Queen and the Duke of Edinburgh are delighted with the news," it added.