Sienna Miller would shave her head for a film.
The 33-year-old actress feels like she's had "8,000 different hairstyles" already for the various films she's starred in but would not be afraid of getting rid of her luscious locks because she doesn't feel "attached" to her hair.
She said: "I'd do anything!"
Asked if she would shave her head, she continued: "Yep, I really would! That's kind of the fun of it, I'm not attached to my hair which is why I've had 8,000 different hairstyles."
Her latest film 'Burnt' sees her playing a feisty sous chef with a shaved undercut and fashionable fringe, and she confessed she felt it was important to change her hair for the role because she likes to look distinct in every film she makes.
She told Vogue.co.uk: "I think it's really important at this point to look really different in everything that I do. I look at 'Foxcatcher' to 'American Sniper' to this and it's not the same persona. I think if you're focused on longevity, which I really am, and battling quite a strong fashion perception, then in my work that's really a place to explore as much versatility as possible physically.
"Plus I always wanted to have one of those fashion fringes - I just don't think that I made it wide enough this time so I looked slightly 'The Secrets of Minh' in it!"