Forgive the crude rendering, but I think I can pull this off for my cousin's wedding.
I have a lovely champagne brocade (thank you Mr. Kashi) that I plan to use for the bodice. - pictures to come- I'm thinking georgette or crepe pants.
Luckily, I already know what the bride's gown looks like, and I'll be nowhere near looking like one of those guests.
more to come. must sew.