Whenever Sienna Miller steps out, the conversation quickly turns to how fresh and effortless her skin looks. At 44, she’s often praised for a glow that reads more like good sleep and smart basics than high-maintenance glamour. That is exactly why her latest beauty reveal has people paying attention. The surprise is that her go-to product is not a luxury jar with a glamorous price tag.
Miller shared her find while appearing in Harper’s Bazaar’s video series that takes a peek inside a celebrity’s makeup bag. She insisted what viewers were seeing was the real deal, describing a toiletry bag that had been grabbed in a hurry after time away. In that mix of well-used essentials, one item stood out. She said she swears by A313 Vitamin A Pommade, a French pharmacy staple made by Pharma Développement, which can be found online for around $20.
Even better, the recommendation came with a very relatable origin story. Miller credited Alexa Chung for putting her onto the product, adding that Chung’s skin was convincing enough to make anyone listen. Miller also repeated the whispery reputation the cream has earned over time, often described as a “French girl” secret for luminous skin. It’s the kind of tip that spreads quickly because it feels both insider and attainable. And it taps into a bigger beauty mood right now, where people want fewer products that truly deliver.
The reason A313 has built a loyal following comes down to vitamin A, a category that includes retinol. Vitamin A derivatives are widely known in skincare for targeting the look of fine lines and uneven tone, but they can be intimidating if you’ve ever dealt with dryness or irritation. A313 is considered a gentler option because it relies on retinyl palmitate, a form of vitamin A combined with a fatty acid. The formula also includes ingredients designed to keep the vitamin A stable and help it spread smoothly on the skin.
Miller noted it’s best used at night, and only in a very small amount on dry skin, followed by moisturizer. Online reviewers echo that slow-and-steady approach, with many describing a gradual ramp-up in how often they apply it. Some say they experienced an initial “purge” period before their skin settled, while others praise how quickly their complexion looked smoother and brighter. A few reviews also mention help with the look of pigmentation and breakouts, which explains why the product has become a repeat buy for so many.
Have you tried A313 or another French pharmacy favorite, and did it live up to the hype? Share your experience in the comments.
