While the description for Butterick B5731 does not explicity say it's meant to copy K-Mid's Sarah Burton for Alexander McQueen, there's no denying it. Butterick even styled their model with a tiara and a similar bouquet.
There are some differences; Butterick 5731 has some weird flappy bustle that I'd leave off were I to sew this, and it's absent the long train that the Sarah Burton dress has.
While I don't usually condone plagiarism, I think in this case it puts the royal dress within reach for us commoners. It's not like you're going to the Berresyessa Flea Market and buying an obvious Louis Vuitton pleather knockoff. This is a sewing pattern in which you, or the dress maker you hire, is required to do all the work, and you have the option to buy the most expensive "Peau De Soie" or the cheapest satin. You can make it any color you choose, and there are even cup size options.
The absolute best part in my opinion: it's a Butterick, so you can likely snatch it up during a Jo-Ann sale for .99 to 1.99.
