Helen Mirren, 79, preps her skin with L'Oreal's moisturizing serum — down to $18

A superstar for over six decades, Dame Helen Mirren is one of the most celebrated actresses in history — read: one Oscar, four Emmys and four BAFTAs — but on top of that, the 79-year-old combines her onscreen virtuosity with a cheeky, irreverent wit and timeless beauty. We're also obsessed with the skin care tips she's given over the years. Whether promoting the benefits of castor oil or cream that promises to bestow a lovely rosy glow, Mirren is always up for turning us on to ace, affordable beauty finds. The latest entry in that pantheon? L’Oréal Paris Revitalift 1.5% Pure Hyaluronic Acid Serum, her trusted pre-red carpet must-have and a product that, according to the brand, is the No. 1 selling serum in America. Right now, it's down to $18, from $36 — that's 50% off.

Amazon

L’Oréal Paris Revitalift 1.5% Pure Hyaluronic Acid Serum

$18$36Save $18

This superstar-favorite serum has been shown to replenish moisture for plumped, youthfully supple skin in as little as one week, says L’Oréal Paris.

$18 at Amazon

Why is it a good deal? ??

A-lister-approved skin care at a drugstore price? We love it! And so do thousands of five-star Amazon reviewers. "This stuff did wonders for my skin," one said. "Absolutely always keep coming back to buy again. And it's cheaper than the store." At just $18, its Amazon price is nearly as low as it goes.

Why do I need this? ??

So how does Dame Helen use this little wonder? In a recent Cannes tell-all with The Telegraph, she revealed that while "I don't really have any [pre-red carpet] rituals per se," she does do one thing before her makeup artists get to work: She preps and moisturizes her skin using L’Oréal Paris Revitalift.

This top-rated bestseller is backed by dermatologists too. "[It] was clinically tested for both stability and effectiveness," NYC dermatologist Joshua Zeichner tells Yahoo Lifestyle. He served on the external advisory panel of docs who had access to the development and research of the serum and validated L’Oréal’s claims.

What makes this serum such a skin-care standout? Its main ingredient. "Hyaluronic acid is a humectant ingredient that pulls in hydration to the skin to plump and moisturize," explains Zeichner. "It acts like a sponge and can bind to 1,000 times its weight in water." Zeichner calls the hydrating active ingredient the "ultimate multitasker in skincare," adding that improved hydration results in the minimized appearance of fine lines and a boost of radiance. All it takes is a few drops in the morning and night, he says.

The serum is suitable across the board. "It can be used across all skin types, even for those with sensitive skin," he says.

What reviewers say ??

This luxe liquid isn't just for big names — Amazon shoppers are big fans too, with more than 34,000 five-star reviewers raving about the formula.

Pros ??

"I feel I look five years younger," one chimed in. “My complexion is incredible. Can't imagine going without this product ever again.”

"Simply amazing," raved another. "After using the serum consistently for a few weeks, I've seen a noticeable reduction in fine lines and an overall improvement in skin elasticity. My complexion looks brighter and more youthful, and the added hydration has helped to reduce dry patches and flakiness."

"It didn’t take long to tell this stuff works! I noticed changes in my skin texture after one use, and now it’s been about 10 days, and my skin is so smooth, soft, and even-toned," another reviewer dished. "Can’t believe it. I don’t even feel the need to wear foundation."

Cons ??

Some shoppers felt their skin didn't agree with the ingredients. "If you're sensitive to [retinol], I'd recommend you move on to something else," a shopper advised.

According to this customer, "I’ve used other hyaluronic acids that I thought were more moisturizing than this. There’s something about the texture of this that’s kind of odd."

Amazon

L’Oréal Paris Revitalift 1.5% Pure Hyaluronic Acid Serum

$18$36Save $18

An amazing 34,000+ shoppers are fans of this popular anti-aging serum.

$18 at Amazon

If you have Amazon Prime, you’ll get free shipping, of course. Not yet a member? No problem. You can sign up for your free 30-day trial here. (And by the way, those without Prime still get free shipping on orders of $35 or more.)

The reviews quoted above reflect the most recent versions at the time of publication.

Looking for more great Amazon style and beauty deals? Check these out:

Beauty

Style