Princess Eugenie and Jack Brooksbank are expecting a baby in early 2021, Buckingham Palace has announced.

A post from the Royal Family's account on Twitter confirmed the news and added the Queen and Duke of Edinburgh are "delighted".

And Eugenie, who is 10th in line to the throne, posted a photo of two tiny, furry slippers on her Instagram, teasing: "Jack and I are so excited for early 2021."

View this post on Instagram

Jack and I are so excited for early 2021....👶🏻

A post shared by Princess Eugenie (@princesseugenie) on Sep 25, 2020 at 1:18am PDT

The baby will be a ninth great-grandchild for the Queen, following the arrival of her eighth; the Duke and Duchess of Sussex's son Archie Mountbatten-Windsor.

But Eugenie's parents, Prince Andrew and Sarah, the Duchess of York, will become grandparents for the first time.

The baby boy or girl will be born 11th in line to the throne, but will not be an HRH or hold a title.

This is because while their mother is a princess, their father has no title and so the child will be born down a female line, meaning they will be plain master or miss.

That would change if the Queen decides to intervene and give Mr Brooksbank - who is European brand manager for Casamigos Tequila, co-founded by George Clooney - an earldom or amends the rules.

Eugenie has been married to Mr Brooksbank for just under two years.

At the ceremony in October 2018, she chose to wear a wedding dress that showed her scar from childhood spinal surgery to correct scoliosis.