The actress, 30, and her beau Benjamin Millepied, 34, caused a stir when they quietly debuted their wedding bands at Sunday's Oscars -- despite there being zero mention of a wedding for the couple, who announced they were engaged and expecting a child in December 2010.
On Tuesday, jeweler Jamie Wolf confirmed to Us Weekly that she was the designer behind the pair's wedding bands.
Jewelry expert Michael O'Connor describes Portman's new dazzling addition to Us: "In the 60's and 70's it was much more common to have two platinum wedding bands, one on either side of the engagement ring, so this style is more retro -- making it an appropriate debut with Natalie's vintage dress at the Academy Awards! Estimated price tag is $20,000 total for both of her bands."
No further details on when or where the actress and dancer-choreographer tied the knot. Portman's manager did not reply to requests for comment from Us. The pair fell in love while making Black Swan in 2010; they welcomed son Aleph in June of last year.