Benjamin Millepied and Natalie Portman
02/27/2012 AT 04:30 PM EST
Did Natalie Portman
slyly reveal big news before more than 1 billion TV viewers?
On Sunday night's 84th Academy Awards
, the actress appeared to be wearing a wedding ring set as she clutched an envelope onstage.
And her French fiancé, Black Swan choreographer Benjamin Millepied
, was photographed with a band on his wedding finger.
Was there a secret wedding? That remains a mystery for now, as the Oscar winner's rep hasn't commented.
Portman, 30, announced in December 2010 that she and Millepied were quietly engaged
and that they were expecting a child. PEOPLE confirmed last June that they had welcomed a son