The Duchess shared a fun boomerang-style video on Instagram of her successfully flipping a pancake, surrounded by some of her children's books, and at HELLO! HQ we couldn't help but wonder if one of them is a hint to Princess Eugenie's baby's name.
WATCH: Princess Eugenie and Jack Brooksbank welcome baby boy!
One of the bookies' favourites for the royal tot is Arthur and in the corner of Sarah's video, her book Arthur Fantastic can be seen.
While it might be purely coincidental, it's the only boy's name that can be seen among the titles of her children's novels.
Sarah shared a fun Pancake Day video on Instagram
The rest include Holly's First Day At School, Little Red's Summer Adventure and Budgie The Little Helicopter.
Sarah's character Arthur Fantastic is a unicorn, who feels like an outsider in the meadow where the horses see only his difference and not his magnificence. He goes in search of his own happiness in the Magic Forest and meets all manner of creatures.
Eugenie and Jack leaving the Portland Hospital with their newborn son
The official announcement about the royal baby's birth from Buckingham Palace read: "Her Royal Highness Princess Eugenie was safely delivered of a son today, 9 February 2021, at 0855hrs at The Portland Hospital. Jack Brooksbank was present. The baby weighs 8lbs 1oz.
"This is Princess Eugenie and Jack Brooksbank's first child, The Duke of York and Sarah, Duchess of York's first grandchild, and the ninth great-grandchild for The Queen and The Duke of Edinburgh. Her Royal Highness and her child are both doing well."
The first photo of Eugenie's baby son
Eugenie shared a glimpse of her newborn son with a gorgeous black-and-white snap on Instagram of the proud parents holding their baby's tiny fingers.
The couple were pictured leaving the Portland Hospital in London on Friday.
Make sure you never miss a ROYAL story! Sign up to our newsletter to get all of our celebrity, royal and lifestyle news delivered directly to your inbox.