Last week, the mum-of-two posted a photo of a yellow iced cake covered in blue and pink flowers.
"Happy happy days of sun and blossoming joy today and always," she wrote.
The cake was followed by a snap of pink flower.
While many assumed she was talking about Easter, some speculated this could have been a baby reveal about her daughter Eugenie.
"Lovely! Am wondering if there's a hidden message in your post... 🤔," one fan questioned.
The comment certainly could be true - many baby celebration cakes are a gender neutral colour like yellow.
And the addition of the pink flower certainly has some thinking it could be a girl!
Fans have publically voiced their hopes for news of her to share a pregnancy announcement.
"Cant wait till we get a Royal Baby Brooksbank announcement. You're my favourite royal couple," one fan gushed.
In the UK, fans are so sure that Prince Andrew's daughter is pregnant that bookmakers have slashed the odds on Eugenie and Jack confirming that they are expecting a baby.
The odds are now at 1:4 with bookies expecting an announcement any day now.
“It looks like the Royals are getting broody,” Alex Apati of Ladbrokes told The Sun.
What’s more, the royal dropped a hint on Instagram earlier this year.
Eugenie shared a snap of her engagement to Jack captioning it, “What a year it’s been since then and how exciting for 2019.”