For the event, she wore a sculptural black midi dress from Ashi Studio that featured sheer fabric that covered her entire body, including her face and hands
5 A-line dresses are sustainable A-line dresses, because of their simplicity, often dont require complex manufacturing, dry cleaning, or even worse, a specialistic dry cleaning
An A-line shirt dress whose added bustier is just too fun to pass up
Black color in a solid gab style
Because [the Royal Family doesnt] like you to wear black Charles never liked Diana to wear black. That sense of rebellion was also present in the last scene of The Crown when (spoilers ahead) Princess Diana is depicted frowning in a family photo, after a heated discussion with Prince Phillip about the prospect of her separating from the royals
But if you don't see any mention of guest attire in the navigation bar, you can head to their FAQ or Q&A page and likely find the attire they'd like you to sport for their wedding listed there