Sienna Miller Debuts Ginger Hair, Opens Up About Being a Single Mom

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Sienna Miller recently ditched her glowing golden locks for a darker copper 'do.

On Monday, the American Sniper actress was spotted in London at the launch party for her sister Savannah Miller's fashion collection Nine at British department store Debenhams.

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Sienna, who posed on the press line with her blonde sibling, looked striking with her fiery red look.

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Although when you're Sienna, you're bound to look pretty striking no matter what color you dye your hair.

Before changing to her new crimson color, Sienna posed for a photo shoot with Vogue UK. She appears on the cover of the upcoming October issue still rocking her long blonde look.

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Speaking with the magazine Sienna explained how she's at a "pivotal point" in her life.

"It's been really quite overwhelming recently, just with the volume of everything going on," Sienna said, referring to her quickly rising film career, along with a series of personal and emotional setbacks. "Everything is shifting. It's actually been the sh*ttiest year, and amazing. It's always yin and yang. I feel like if you're excelling in one area, it's hard to manage both and I do feel like the work is going really well."

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The 33-year-old actress is the mother of 3-year-old daughter Marlowe who she shares with recent-ex Tom Sturridge. Despite the split, Sienna shared that she's excited to have had full-slate of films, including five upcoming projects hitting theaters over the next two years.

However, it seems that her work as a mother is the most rewarding and chaotic aspect of her life.

Vogue UK

"Obviously when you have a baby it's the most incredible experience but your life is also catapulted into this chaos and you are exhausted," Sienna said. "I could literally get on this table and fall asleep. I'd like to be better at managing things; I'd like to be more super -- although we're never going to feel it, even if we are. That's the curse of motherhood - we just run ourselves ragged."

The October issue of Vogue UK hits stands Sept. 10.