Natalie Portman's Wedding Gown Believed to Be by Rodarte

Natalie Portman at Oscars - P 2011
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The actress wore a white '50s-style dress with a nipped waist, tight bodice and full flared tea-length skirt to marry Benjamin Millepied.

It's not confirmed yet, but all signs point in the direction of Rodarte -- by the sisters Laura and Kate Mulleavy - as the designers of Natalie Portman's white '50s-style wedding gown she wore to wed Benjamin Millepied in Big Sur over the weekend.

STORY: Natalie Portman Marries Benjamin Millepied

At first, fashion watchers assumed it to be Dior, because its nipped waist, tight bodice and full flared tea-length skirt are almost a replica of what Dior creative director Raf Simons showed at his recent (and first ever) Dior couture show. Plus, Portman is a spokesperson for the brand.

But instead, she got married -- still unconfirmed by her reps -- in an original look by her friends the Mulleavys, which featured a tulle sheer overlay to cover Portman's arms and chest. It was Rodarte who designed Portman's plum gown when she won the Oscar for Black Swan in 2011 and was still very pregnant with her son, Aleph.

STORY: Natalie Portman Gives Birth to Baby Boy

Portman has also worn Rodarte for the press tour of The Other Boleyn Girl, and of course, Rodarte designed Portman's dance clothes in Black Swan as well.