Alexandra Saint Mleux turned a quiet Instagram moment into a full-on fashion statement on Tuesday, February 17 and fans couldn’t get enough.
The Monaco-based art enthusiast and style influencer, 25, shared a series of soft, sunlit photos posing beneath ornate archways, holding a single red rose that popped vividly against her all-ivory look.
Alexandra Saint Mleux / Instagram
Her outfit was sleek and sculpted with Spanish inspired romantic detailing. She wore a flowing ivory top with flutter sleeves and layered ruffles cascading down a deep V neckline.
The lightweight fabric moved easily, while subtle side cutouts added a modern, body-skimming edge.
Alexandra Saint Mleux / Instagram
She paired it with a matching high-waisted, floor-length skirt that hugged her hips before falling straight to the ground in a smooth, fluid line. The monochrome styling kept everything clean and intentional, allowing texture and fit to stand out.
In several close-up shots, Saint Mleux gave followers a closer look at her stunning engagement ring, reportedly worth over $500,000, from her fiancé, Charles Leclerc.
Alexandra Saint Mleux / Instagram
The Formula 1 driver, 28, proposed to Saint Mleux back in November 2025, and the sizable diamond caught the light effortlessly as she held the rose, with her deep burgundy manicure adding contrast the overall look.
Fans flooded the comments, swooning over both the look and the sparkling symbol of her next chapter. One fan wrote “stunning bride to be,” while another added “Oh my goodness this is absolutely angelic.”