If the event is black-tie, an evening gown is more appropriate, preferably in understated colors like black, navy, or metallic shades
Women's attire: Floor-length dresses are a safe bet, though sleek jumpsuits are also appropriate, as are elegant cocktail dresses
Sexy Thigh-high Slit Dark Green One Shoulder Prom Dress $179 USD (free shipping) Sexy dark green satin one-shoulder thigh-high slit sheath long evening prom dress
The overall principle is that an engagement party is a joyful, celebratory occasion, so the silhouette should feel festive and let you enjoy the celebration, whatever your role
Muse Assembly Muse Assembly Dahlia Floral Embroidered Satin Slip Mini Dress Current price: $119.99 Original price: $150.00 From Urban Outfitters
All-Season Versatility: The perfect transitional piecelayer it with leggings and boots for winter or wear it solo with sneakers for a breezy spring afternoon