Sister Showdown! Kate vs. Rooney

Actress Kate Mara showed up to last night's The Girl with the Dragon Tattoo NYC premiere to support little sister Rooney, and to say these two siblings have different styles is an understatement.

Kate chose possibly the girliest Christian Dior dress imaginable to the premiere of the dark thriller, while Rooney rocked an edgy backless, cut-out Prabal Gurung dress very fitting for her dark role.

So which Mara sister do you think wins this fashion showdown? Ladylike Kate in her pink mini, or gothic Rooney in her super-sheer gown?