and Rooney Mara may be sisters, but the "House of Cards" starlet looks just like Sienna Miller!

The actress recently lightened her locks, brightening up the roots and tips into a platinum blonde ombre style.

Kate was snapped at the 4th annual AFI Awards Luncheon at the Four Seasons Hotel in Beverly Hills on Friday, rocking her new 'do and a green printed frock.


Not only is she channeling Sienna with her new hair color, but her dress is definitely an item we could see in Miller's Twenty8Twelve clothing line.

While it seems Kate is taking style cues from Sienna, it's her sister's opinion that counts.

"We don’t ask for opinions all the time—but for a big of event, like the Emmys, absolutely," Kate told Glamour magazine in October. "I actually sent her a picture of the [J Mendel] dress I wore to the Emmys before I chose it, and she was obsessed. She was like, 'Oh, I want that.' And I said, 'Let me wear it first!' 

We can't wait to see what Kate wears on the red carpet at the Golden Globe Awards on Sunday! Check out toofab for full award show coverage.

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