Mandy Moore
How can I find out who made a wedding dress worn by Mandy Moore in the film 'License to Wed'?
It's the one she wears in the scene at the end, where she's getting married on the beach.
Rent the DVD and see who the costume designer is/was by watching the movies end credits. I'm sure that you can find out the information somewhere. It's possible you could find out the information on the IMDB page, too.