Dakota Johnson Swears By This Hair Growth Serum for Her Signature Liquid Locks—I'm Purchasing 3.

      There's little we overlook regarding Dakota Johnson and her effortlessly stylish choices. Whether she's seen sporting a new denim shade on the set of Verity or captivating us with her flowing, liquid hair on red carpets, we eagerly examine the details of the 35-year-old actress’ outfits—and since arriving in Cannes for the 2025 Film Festival, she has not let us down. Johnson made an appearance on the red carpet for her Splitsville premiere, wearing a ballerina-pink Gucci gown adorned with fringe, perfectly complemented by her flowing brown locks. While we've long identified Johnson with her long, healthy hair, she reached Rapunzel-like status today with her sleek mane cascading well past the waistline of her gown. Her secret, as revealed by celebrity stylist Mark Townsend? The hair growth brand favored by editors and trusted by Sofia Richie for ensuring thick, healthy hair post-pregnancy: Nutrafol.

      “For Cannes, I wanted Dakota’s look to be both timeless and elevated,” Townsend tells Who What Wear. “We opted for smooth, sleek, straight hair—an elegantly effortless appearance that allows her natural beauty to stand out.” Drawing inspiration from Johnson’s fringed gown, the stylist styled her full bangs and flowing strands into a long, glossy sheet to “counterbalance” the outfit. “No extensions; it’s all hers!” he exclaims.

      If this last statement made you wish for faster hair growth, we understand, but Townsend clarifies that the key to fairytale-length hair is proper care—especially with regard to strand and scalp health. Even though Johnson’s schedule has been filled with travel for events, film shoots, and Cannes preparations, Townsend was able to care for the star's hair using Nutrafol’s Hair Serum, which he calls an “essential” in his toolkit.

      This hair serum is favored by celebrity hairstylists due to its lightweight formula that absorbs quickly without leaving the scalp feeling greasy—ideal for both hair growth and strand-smoothing (a major advantage during busy red carpet preparations). “I’ve tried numerous serums over the years, but what distinguishes this one is how effectively it works alongside Nutrafol’s supplements,” Townsend explains, adding that he, too, regularly takes the growth-boosting supplements used by Richie. “Nutrafol’s Hair Serum wonderfully enhances the internal support from the supplements. Particularly for red carpet prep, when the hair faces heat, tension, and multiple styles in a short period, that level of care is crucial,” he continues. “I never go to a job without it!”

      The serum’s formula, developed by physicians and clinically tested, boasts ashwagandha exosomes (proteins and lipids that promote healthy, shiny hair), Irish moss peptides (which boost hair strength), and pea sprout extract (to enhance thickness). A single dropper full applied daily to the scalp, focusing on thinning areas, leads to visibly stronger, healthier, and thicker hair after about 90 days of consistent use. Pro tip: You can spread any excess residue from your hands through your hair to achieve Johnson’s sleek, liquid strands.

      In addition to delivering glass-like hair, Townsend utilizes this serum for the protective measures that celebrity hair frequently demands—especially during significant events like the Cannes Film Festival. “Irregular sleep and jet lag can visibly affect the hair,” he notes. “Caring for hair from the inside out truly makes a difference.”

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