There may well be many more opportunities to do this dress up thing than there is to do the black tie thing
Buy Plus Size Dresses Wedding Guest Fall Navy Blue Women Midi Long Sleeve Lace Semi Formal A Line Winter Smocked Flowy Dress | Navy blue, floral burnout jacquard, square neck, smocked bodice, semi-sheer puff sleeve, tiered hem, midi, wedding guest and other Casual at Amazon.com
Sources: Harpers Bazaar : Princess Dianas nieces pay tribute to her revenge dress on its 30th anniversary Tatler : When Lady Eliza and Lady Amelia Spencer spoke to Tatler about Althorp, South Africa and their aunt, Princess Diana Tatler : A royal rework
Simple, elegant, and classically cool
The leisure style makes it easy to layer and accessorize
Cut shorter than a mini for a breezy, throw-on-and-go feel, its finished with mother-of-pearl buttons at the center front