Rooney Mara - Oscars 2012 Red Carpet
The 26-year-old actress is nominated for her role as Lisbeth Salander in The Girl with the Dragon Tattoo.
Earlier in the week, Rooney wore a plunging neckline J. Mendel dress for the Costume Designers Guild Awards.
FYI: Rooney finished her look with a Fred Leighton ring.
Billy Crystal hosts the 2012 Oscars live TONIGHT at 8:30 p.m. ET/5:30 p.m. PT on ABC!