The cut, color and signature Cool-Girl Waves

There’s no two ways about it. Sienna Miller is synonymous with style. The actor has forged such a “cool girl” image over the years that it seems like she’s imbued the laid-back, effortless glamor without even lifting a finger. And part of that London-girl-about-town vibe that makes it both approachable and striking is that seemingly effortless style that is Sienna Miller’s hair.

The 40-year-old star can try different looks for events and the red carpet, “her always tousled, soft and relaxed hairstyle has become a hallmark of her brand and her look”, says Dom Seeley, celebrity hairstylist and International Creative Director at ColorWow. From cutting and coloring to recreating her effortless tousled hairstyle, here’s how to get Sienna Miller’s signature hair according to experts.

How to Recreate Sienna Miller’s Haircut

When it comes to Sienna Miller’s haircut, “it’s all about showing confidence,” says Syd Hayes, celebrity hairstylist and Babyliss ambassador. “It’s the haircut that will always be in style, it’s just how you style it.”

The actress’ effortless layered look is “soft and rounded to create movement and texture,” says Seeley. “His layers have been stripped of the weight allowing his natural wave to flow through.”

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As she tries her hand at bangs and different haircuts, even as far as trying out a modern take on “The Rachel” a few years ago, Sienna Miller always goes back to a softer, face-framed layering.

To recreate Sinna Miller’s haircut, ask your hairstylist for long layers and a long, feathered front that frames the face, and if you have thicker hair, ask for the weight to be taken off the ends of your locks so you don’t not lose volume and movement.

“While Sienna’s hair is very low maintenance, I would always say every 8-12 weeks for a trim,” says Seeley. “I love this time frame because it allows for some growth, but also gives the hair a chance to naturally thin out towards the ends, giving this effortless look.”

How to Get Sienna Miller’s Hair Color

While Miller has experimented with different hair colors over the years, she always goes back to her signature golden blonde. “Sienna Miller’s hair color is always golden and buttery,” Seeley says, “so you want to avoid ashy and purple tones.”

“The great thing about her hair color is that it’s vibrant, healthy and gives her skin a real glow,” he says. “Because it’s golden, it works well in all seasons of the year.”

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Bringing a photo to your colorist or hairstylist is always a surefire way to make sure you’re both on the same page when it comes to what you want. Ask for golden tones and highlights, and avoid ashy or purple tones, and don’t forget to mention only adding subtle color to the roots, to aid growth.

“It still looks slightly darker at the roots, again completing the cut without harsh lines or telltale signs of color work in progress,” he adds.

How to Recreate Sienna Miller’s Signature Cool-Girl Waves

“The key to creating Sienna’s signature undone look is to regularly stop while styling and take a second to see how the hair is doing,” says Hayes. “You have to know when enough is enough, it’s too easy to get lost in process and style.”

“Less is more, so don’t complicate it too much,” Seeley agrees. Start by drying your hair using heat protectant. “If you suffer from frizz, hit it with a puff and smooth it out before using rollers or pins to set curls,” he adds. “Pull out your Velcro rollers to lock in that fluffy, airy volume and texture.”

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Once dry, Hayes suggests using a twist wrap technique (rather than wrapping the hair flat) to create a looser, less polished wave. He also recommends alternating the direction of each strand of hair to create “kinks and creases” rather than a classic, unified curl.

“Make sure the front sections that frame the face curl away from your eyes,” adds Hayes. “This way the hair looks thicker because there’s more texture. Leave the ends out and hold the curl once it’s formed to cool and set so the style lasts longer.