Rare Showpiece for movie "Indecent Proposal" Thierry Mugler Dress Demi Moore SOLD exclusively on IG! Does this dress look familiar? Well, there's a reason for that. The designer Thierry Mugler version of this dress was made for and worn by Demi Moore in A dress that became bigger than the film itself. , Demi Moores iconic black cut out dress, designed by Thierry Mugler in Indecent Proposal, created massive buzz after the films release., The bold Indecent Proposal Film Dress TikTok