Rooney Mara & Kate Mara: “Her” Premiere Pals

Posted Friday December 13, 2013 2:23 PM GMT

Showing a little support for family, Kate Mara showed up at the premiere of her sister Rooney Mara's new flick “Her” in Los Angeles last night (December 12).

The “House of Cards” hottie looked gorgeous as she posed for the paparazzi outside the DGA Theater prior to the Warner Bros-hosted event.

Additionally, Rooney was also at the shindig, flashing a rare smile and sporting a fabulous vintage-flavored black dress as she greeted the crowd.

“Her” is slated to hit theaters on January 10th and stars Joaquin Phoenix, Scarlett Johansson, Amy Adams, Chris Pratt, and Kristen Wiig.

Per the synopsis, “A lonely writer develops an unlikely relationship with his newly purchased operating system that's designed to meet his every need.”

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