Natalie Portman arrived at the 84th Academy Awards looking stunning in a polka-dot vintage Dior dress and Harry Winston diamonds. The actress took home the best actress Academy Award last year for Black Swan when she was pregnant with her son, Aleph. She's been taking time off since her big win to raise her baby with fiancé Benjamin Millepied, who was by her side tonight. What do you think of Natalie's look? Make sure to vote on all the Oscar polls here.