Blond or brunette? Short or long? Kate Mara doesn't care, as long as she's not defined by her hair. “I was just ready to not be — this sounds really cheesy — but I didn’t want to be defined by my hair color,” Mara recently told People mag. “My hair has always been crazy long and I was just ready to let that go.”

Kate Mara has long wooed us with her long, auburn locks. From her early role in We Are Marshall to her current gig at House of Cards, Kate has consistently looked different than her little sister, Rooney. Known for her groundbreaking role in Girl With The Dragon Tattoo, Rooney quickly became her edgy character on the red carpet, sporting a dark slicked-back 'do, scarlet lips and fashion-forward gowns.  But not Kate. 

Kate Mara Kate Mara showed off her lighter locks during the film premiere of Her.

The Maras come from a famous sports family, but they've always been incredibly down-to-earth in interviews. The sisters' paternal grandfather was co-owner of the Giants. Their maternal grandfather runs Yonkers Raceway. And their great grandfather founded the New York Giants.

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The esteemed Mara lineage has come with its pros and cons. The Mara sisters were instantly known in Hollywood. Yet they are frequently under the microscope because the siblings come from such a famous family. The comparisons to her younger, edgy sister have not gone unnoticed either.

Rooney Mara Clad in a Givenchy coat, Rooney Mara brought an NYC sensibility to the L.A. premiere of the film Her.

Kate Mara Kate Mara went for a girly mini at the Her premiere in December 2013.

When Rooney and Kate walked the red carpet at Rooney's Her premiere in December they could not have looked more different. Rooney opted for a dark high-neck coat by Givenchy, while Kate chose a girly green mini by J. Mendel. 

Though Kate's platinum color may not feel fashion-forward to some, the choppy bob is certainly a departure for the actress with a good-girl persona. For now, though, Kate is just trying to figure out how best to adjust to her new look.

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“Obviously the color changes the way makeup looks and the way colors look,” Mara told People. “With my natural red hair I gravitate more towards color, and with the blonder hair I like to wear more neutral things like black and white.” 

Watch Kate talk about the sisters' friendly sibling rivalry on Chelsea Lately: