Oscar nominee Natalie Portman’s red-carpet style

A diamond brooch accents Natalie Portman’s classic Chanel at the 63rd Annual Golden Globe Awards.  (Anne Cusack / Los Angeles Times)

Natalie Portman arrives at the 81st Annual Academy Awards.  (Ethan Miller / Getty Images)

Natalie Portman arrives for the screening of “The Black Swan” that opened the 67th Venice Film Festival.  (Alberto Pizzoli / AFP / Getty Images)

Actress Natalie Portman arrives at the 17th Annual Screen Actors Guild Awards.  (Frazer Harrison / Getty Images)

Natalie Portman arrives at the 2011 Palm Springs International Film Festival Awards Gala in Palm Springs.  (Dan Steinberg / Associated Press)

Natalie Portman attends the 11th Annual AFI Awards at the Four Seasons Hotel in Los Angeles.  (Alberto E. Rodriguez / Getty Images)

Natalie Portman poses backstage with her award for best actress at the 16th Annual Critics’ Choice Movie Awards.  (Dan Steinberg / Associated Press)

Natalie Portman, winner of the award for best actress in a motion picture for “Black Swan,” arrives at the 2011 InStyle and Warner Bros. 68th Annual Golden Globe Awards post-party.  (Kevork Djansezian / Getty Images)