backless halter dresses Beatrice Babydoll Mini Dress • American Threads Cream / L this slim Ember Backless Halter Knit Dress

Floor-length evening gowns: The quintessential look for a black tie wedding, a floor-sweeping gown will never go out of style

The silver fringe dangling from the pockets gives these just enough flair, but they're still casual enough to wear with sneakers while doing something low-key during the day

There was a silly British gangster film in 1960, Too Hot to Handle, where Jayne Mansfield wore such a dress, and about which the story was promoted that the movie was so risque a few extra sequins had had to be painted on to the film to protect (or fetishise) Jaynes nipples

This gorgeous dress is girly, whimsical, and dreamy as can be

Heres how to narrow it down: Consider the venue