In an image captured on the day, the three women were seen chatting privately together, away from the rest of the crowds - and fans are convinced the 30-year-old is sharing some very exciting news.
"Think Eugenie is expecting? The body language in this photo is interesting," one royal watcher shared on Instagram.
"Looks like pregnancy conversation," another commented.
Rumours have been swirling for a while now that Eugenie and her husband Jack Brooksbank are set to welcome a baby into the world.
Earlier this year, Eugenie's mum Sarah 'Fergie' Ferguson, hinted at her youngest daughter's pregnancy by posting a cryptic photo on Instagram that drew comparisons between Meghan Markle and Prince Harry's journey from St Geroge's Chapel to parenthood within a matter of months, and the similarly likely path Eugenie and husband Jack Brooksbank might take.
Princess Eugenie racked up huge bill for party at lap dancing club claims source
