On Wednesday afternoon, Cara Delevingne revealed her latest beauty transformation at a book signing for her debut Young Adult novel Mirror, Mirror.

The British supermodel, actress, singer and author attended the event in London with her short, spiky pixie cut dyed a new shade of rich, chestnut brown (a perfect hue for fall). Delevingne complimented her edgy new look by pairing her darker hairstyle with gray, smoky eye makeup, sculptural earrings and a sleeveless blue dress.

Cara Delevingne in London.

Tristan Fewings

Cara Delevingne in London.

Tristan Fewings

While this new style is a first for Delevingne, the Paper Towns star has been experimenting with cut and color ever since she ditched her long, golden blonde locks back for her role in Life in A Year back in April. Following in the footsteps of many of Hollywood's leading ladies, Delevingne first stepped out with a short buzz cut. In June, she jumped on board with Hollywood's latest platinum craze, attending the Chanel show during Paris Haute Couture Week alongside singer Katy Perry with a tousled bleach blonde pixie. Then, she quickly opted for a more playful color palette, debuting a pastel pink style at the premiere of her latest film Valerian and the City of a Thousand Planets in August.

Delevingne has always been known for her bold and adventurous style, so it's no surprise the British beauty is willing to experiment to cut and color. Now, we can only wonder what color will she try next?

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