The most expensive costumes (and props) ever used on Hollywood film sets

[post_page_title]My Fair Lady – Ascot dress ($3.7 million)[/post_page_title]
Ahhh, Audrey Hepburn. You really can’t go wrong with an Audrey Hepburn movie, because you always know she is going to be impeccably dressed. While filming My Fair Lady, Hepburn was given a chance to wear this amazing Cecil Beaton dress to the Ascot racecourse.

While Beaton may have gone a little overboard with the lace and the matching umbrella and hat, this dress has become an iconic costume within the world of Hollywood. Because of this, one willing buyer decided to pay out $3.7 million for it in 2011.