Sienna miller hair

The secret to Sienna Miller's effortless tousled hair? Sam McKnight just shared, while Sienna threw her head upside down for extra volumizing benefits.

Meow.

The Layer Cake actress looked effortlessly chic in a cream maxi skirt and black chunky roll-neck jumper as she spent time at Sundance Film Festival in Park City, Utah on Friday

David Mallett on Instagram: "Paris… Spring time… Blond. Sienna Miller, the most exquisite Parisien balayage, executed by Master colourist @s0nia.akkari #davidmallett #hairstylist #haircolorist #hairsalon #haircare #hairbeauty #stylist #notredamedesvictoires #paris #placetobe #balayage #highlights #springinparis #blond"

Sienna Miller is a true hair inspiration. Here, we've rounded up the best Sienna Miller hair pictures for you to take to the hairdresser. Read more on Grazia.

File this into your mental rolodex for nights when you want to look hot but have just about zero energy for getting there.

Whether it's perfectly imperfect bedhead (Kate Moss), a shaved pixie cut (Rihanna), or blunt bangs (the entire Birkin clan), the coolest hair has one thing in common: It looks absolutely effortless.