Dressed in a airy black midi-dress which subtly shrouded her figure, Eugenie couldn't contain her happiness and beamed from ear to ear as she made her way to a waiting car.
The Queen's granddaughter kept her makeup to a minimum and looked positively radiant in the floral ensemble.
Strong patterns are a well known styling trick used to distract the eye from the wearer's figure.
Those watching carefully will remember Eugenie's glowing appearance alongside mum Fergie and husband Jack at a charity event earlier this month.
WATCH this video to see the Princess' pregnancy glow!
Eugenie's latest Instagram post also added fuel to the already blazing fire of royal baby rumours.
After failing to appear at Kate Middleton's Chelsea Flower Show exhibit - which was attended by sister Princess Beatrice and Queen Elizabeth - Eugenie shared a series of throwback photos from the 2018 event.
Last week, Eugenie's mum Fergie 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 George's Chapel to parenthood within a matter of months, highlighting the path Eugenie and husband Jack Brooksbank are also thought to have taken.
And if you're STILL not convinced, check out the video below for all the clues that another royal baby is on the way!