midi denim fringe dress Zimmermann Women's Rhiannon Minidress - Atlantic This blue dress features a simple strapless silhouette and eye Atlantic Rhiannon Fringe Denim Midi

Basically, think nice attire for a formal occasion, but no need to wear a long gown

Grace apparently pulled Diana aside for a private chat in the bathroom, and after Diana opened up to her about her anxiety, Grace reportedly comforted her with some dark humor, saying, Dont worry, itll only get worse. The choice of black for Diana's public debut as Charles' fiance was especially bold because as Charles apparently told her at the time, it was a color normally reserved for funerals, not evening functions, according to The New York Times

It can be shorter or all the way to the floor

Perfect for cocktail hour, style with stilettos