I bought this beautiful glittering fabric long ago and I also had the wig (though for another character), that fits Anastasia well. So I finally made her opera dress for the promotional event, held in the fabric center of our city.
You can also watch the promotional video that we made HERE [link]
I've made it in 4 days so there's some details I need to improve. But in general costume is ready I know her dress was not glittering in the movie, but I felt in love with this fabric, when first saw it and I think it looks good in result. Though I'm not satisfied with the veil part, I hope to remade it.