"Gap Couture" she called it.After sweeping awards season, Da’Vine Joy Randolph walked the Met Gala steps for the first time in a denim creation from Gap—a refreshing twist on this year’s “Sleeping Beauties: Reawakening Fashion” theme.

The custom, form-fitting denim gown has a romantic corseted bodice, seams running down the dress to trace her silhouette, flowing sleeves and a grand, draped train, patched together with multiple color washes. Posen constructed the gown with Gap's denim ...

There is some evidence that Da’Vine Joy Randolph manifested this. “I’ve always wanted to go, and it has always meant so much to me,” said Ms. Randolph, who won an Academy Award for best supporting actress for “The Holdovers” in March.