Is Amanda Seyfried a brunette? See the star's hair transformation

As a dog lover, Amanda Seyfried was proud to post a photo on Instagram with her pup Finn and wish him a Happy National Dog Day. But it was her seemingly new 'do that caught our attention.

Happy #nationaldogday, folks!

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The actress, famous for her roles in beloved films like "Les Miserables" and "Mean Girls," is pictured with a completely different style than the long blond locks for which she's best known. With piece-y bangs and a brunette bob that seems to skim her shoulders, Seyfried is barely recognizable.

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In fact, the star could almost be mistaken for a modern-day Audrey Hepburn ... with shades to match!

But before we start referring to her as a brunette, it's important to note that this new hairstyle is only temporary. The actress posted a wider photo of herself (looking characteristically poised next to a donkey, of course) and acknowledged that it is indeed a wig.

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Gratuitous donkey shot in wig 📷@elipowers11

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Perhaps this dramatic new look is for an upcoming role in a movie? Or, maybe she's getting in touch with her sultry alter ego? No matter the inspiration, it looks like Finn loves it — check out that huge smile!