Dakota Johnson Uses This Growth-Boosting Serum for Her Iconic Liquid Hair—I'm Buying 3
Sofia Richie Grainge trusts this brand for healthy locks, too.


There’s not much we miss when it comes to Dakota Johnson and her effortlessly chic style choices. Whether she’s spotted wearing a new denim hue on the set of Verity or inspiring us with her long, liquid hair on red carpets, we’re quick to analyze the details of the 35-year-old actress’ looks—and since arriving in Cannes for the 2025 Film Festival, she has not disappointed.
Johnson graced the red carpet for her Splitsville premiere wearing a fringe-dripped, ballerina-pink Gucci gown complemented by her fluid brown tresses. While we’ve always associated Johnson with her long, healthy hair, she reached Rapunzel status today with her pin-straight mane falling past the waistline of her gown. Her secret, according to celebrity stylist Mark Townsend? The hair growth brand that editors love and Sofia Richie relied on for thick, healthy postpartum hair: Nutrafol.
“For Cannes, I knew I wanted to keep Dakota’s look timeless and elevated,” Townsend tellsBest Knockoff Luxury Clothing . “We went with smooth, sleek, straight hair—an effortlessly elegant look that lets her natural beauty shine.” Inspired by Johnson’s fringey gown, the stylist shaped her thick bangs and cascading strands into a long, glassy sheet to “counterbalance” the look. “No extensions, it’s all hers!” he gushes.
If this last comment made you mentally will your hair to grow faster, we’re right there with you, but Townsend explains that the trick to fairytale length is proper care, specifically concerning strand and scalp health. Though Johnson’s schedule has been packed with travel for red carpet events, movie shoots, and Cannes prep, Townsend was able to nurture the star’s strands with Nutrafol’s Hair Serum, which he calls a “nonnegotiable” in his kit.
This hair serum is a go-to for celebrity hairstylists because of its lightweight formula that absorbs quickly without leaving the roots or scalp feeling greasy, making it great for both hair growth and strand-smoothing (a huge perk for hectic red carpet prep).
“I’ve tried many serums over the years, but what sets this one apart is how well it works in tandem with Nutrafol’s supplements,” says Townsend, going on to say that he, too, regularly takes the growth-stimulating supplements that Richie relies on. “Nutrafol’s Hair Serum beautifully complements the internal support of the supplements. Especially for red carpet prep, when the hair is under heat, tension, and often subject to multiple looks in a short time, that kind of care is essential,” he adds. “I never leave for a job without it!”
The serum’s formula, engineered by physicians and clinically tested, is strong-armed with ashwagandha exosomes (proteins and lipids that encourage healthy, shiny hair), Irish moss peptides (supports hair strength), and pea sprout extract (to improve thickness). All it takes is one dropper’s full a day on the scalp, concentrating on any thinning areas, to generate visibly stronger, healthier, and thicker results after approximately 90 days of regular use. Pro tip: You can smooth the extra residue on your hands through your hair to achieve Johnson’s sleek, liquid strands.
Aside from glass hair results, Townsend relies on this serum for the strand-saving measures that celebrity hair often requires, especially when it comes to big moments like the Cannes Film Festival. “When sleep is irregular and jet lag sets in, it can show up on the hair,” he explains. “Supporting hair from the inside out makes all the difference.”
Shop More Nutrafol Hair Products

Alyssa Brascia is an associate beauty editor atBest Knockoff Luxury Clothing . She is based in New York City and has nearly three years of industry experience, with rivers of content spanning from multigenerational lipstick reviews to celebrity fashion roundups. Brascia graduated with a BS in apparel, merchandising, and design from Iowa State University and went on to serve as a staff shopping writer at People.com for more than 2.5 years. Her earlier work can be found at InStyle, Travel + Leisure, Shape, and more. Brascia has personally tested more than a thousand beauty products, so if she’s not swatching a new eye shadow palette, she’s busy styling a chic outfit for a menial errand (because anywhere can be a runway if you believe hard enough).
-
I'm Calling It—Collegiate Girl Fall Is Happening, and These Products Epitomize the Trend
It's time to hit the books.
-
Ulta's Fall Haul Sale Is a Gold Mine for Skincare Lovers—Here's Every Product Worth Buying
These gems are selling out fast!
-
Wholesale Replica Bag Beauty Products to Hit Sephora Are Too Splurge-Worthy to Pass Up—These Picks Are Proof
Your fall essentials just arrived!
-
This ‘60s-Style Fringe Is Big News for Fall—Here’s What Makes It so 2025
Chic, chic, chic.
-
Wool Trench Coats, Tailored Trousers, and These 13 Gothic Perfumes—the Editor Blueprint for a Dark Academia Fall
The perfect accessory.
-
Alert the Group Chat:Replica Store Has So Many French Beauty Staples on Sale Right Now
Prices start at $10.
-
From Byredo to La Mer: I Can Save $730 on 15 Cult-Classic Beauty Items During This Sneaky Sale
This is epic.
-
Say Goodbye to Polished Bobs This Fall—These 8 Styles Are Coming for Its Crown
It's time for a hair refresh.