Charlotte Casiraghi dazzled at a Paris Fashion Week party on Monday night amid rumours that she might be pregnant.
The Monegasque beauty was chic in a loose-fitting white dress which kept the fuller figure that she had displayed at the weekend under wraps.
Princess Caroline's daughter looked radiant, sporting minimal makeup to allow her distinctive Grimaldi features to do the talking.
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The 26-year-old, who is dating French actor Gad Elmaleh, posed for photographers at a jewellery launch party. She had travelled to the French capital from Monaco where she had spent the weekend at a showjumping competition in Monaco.
Her appearance at the equine extravaganza first sparked pregnancy rumours.
She was sporting an ivory-coloured jacket which seemed to show the beginnings of a baby bump and her stance, with her hands resting protectively by her rounded tummy, suggested that there might be a little one on the way.
He or she would be the second grandchild for Princess Caroline whose son Andrea Casiraghi and his fiancée Tatiana Santo Domingo welcomed baby Sacha into the family in March.
It seems Charlotte's mother might have had an inkling too. As the pair lined up to applaud the winners in Saturday's ceremony, she glanced down at her radiant daughter's tummy.
The duo laughed and smiled together as they looked on during the podium ceremony before presenting trophies.
Twitter was aflutter with rumours of another royal baby for Monaco after the photos of Charlotte were published.
Charlotte's beau, 41-year-old Gad is a popular comedy actor. He first caught the eye of Monaco's beautiful young royal at the beginning of last year.
Since then their relationship has gone from strength-to-strength with transatlantic visits and most recently a high-profile outing at Monaco's glittering Rose Ball.
On Sunday, Charlotte was joined by Princess Caroline's brother, Prince Albert, which saw the equestrian star slip into a more brightly coloured outfit.
The 26-year-old wore a loose-fighting cobalt number which drifted over the rounded tummy which had been more visible on the previous day.
Charlotte surprised royal watchers by separating from her partner of four years, Alex Dellal, in 2012. Charlotte and Alex, the son of millionaire property owner Guy Dellal got together in 2007.