Mrs. Baldwin’s plunging neckline shocks DC elite

Hotheaded Alec Baldwin was on his best behavior at a Washington, DC, gala celebrating the Smithsonian’s new yoga exhibition at the Sackler Gallery. But his wife Hilaria’s shimmering Reem Acra dress revealed, as one guest put it, “a cornucopian bosom,” that didn’t go over so well with the Beltway elite.

Hilaria Thomas addressed the elite crowd as “you guys.”Star Traks

Beyond-daring, plunging necklines have recently been the rage for LA stars from Kim Kardashian to Gwyneth Paltrow, but the heaving boobalicious look wasn’t a hit with a rarefied crowd that included exiled Empress of Iran Farah Pahlavi, Dame Jillian Sackler and Sally Quinn, who’s been dubbed “the Dowager Countess of Washington’s elite social set.”

“It was a serious room of collectors, mostly 60 and over,” sniffed a guest, who did give brand-new mom Hilaria props for “standing for hours in her slinky dress.”

But in a town of orators, Hilaria didn’t win points either for addressing the crowd repeatedly as “you guys,” or making them raise their hands to vote on whether beefy Baldwin should “get into yoga,” witnesses tell us.

Another source added that when the yoga-teacher-turned-“Extra” correspondent left the stage, she shared that she was “going home to feed the baby.”

Indeed.

The next day, she taught a yoga class at the Sackler Gallery where “Yoga: The Art of Transformation” runs through Jan. 26.

New mom Hilaria responded via Twitter:

Fans were divided. One supporter added to her comment, “If someone is gossiping about someone’s boobs, they must look pretty good,” but another Twitter follower shot back, “it has nothing against your boobs or who likes or not… it is about inappropriate dress for occasion.”