abercrombie and fitch black dress & bubble hem babydoll mini in an open back Women's The A&F Julia Slip

Certainly a long dress is appropriate, but the key to black-tie style is formality: As long as the dress feels sophisticated, the hemlineranging from just above the knee to tea-length (which hits at midcalf)is up to you

1950s Grace Kelly in the movie Rear Window celebrity dress inspired tea-length black and white custom-made party dress

Opt for elegant fabrics like satin or lace to elevate your black tie wedding dress guest while keeping it wedding-appropriate

Besides fashion or Fanservice, it also doesn't stain much when her (or preferably, someone else's) blood gets on it

The ruffle hem adds a touch of flirty movement to your look, while the fitted waist creates a flattering silhouette that complements all body types