Designer Monique Lhuillier on Heidi Montag's $20,000 wedding gown

With three and a half weeks on creating a memorable dress, Designer Monique Lhuillier shared that the "Cinderella-like" gown that Heidi Montag uses on her recent wedding which the bride described on her twitter page as "amazing – like a swan princess" cost $20,000.

In her recent interview, Lhuillier tells ET that "Heidi's lightweight, strapless, full-gown, feathery bridal ensemble cost $20,000 altogether, including the veil.

She said that Heidi came to her with the idea that she wanted an over-the-top look for her nuptials - pure fantasy. Heidi wanted a dress unlike any other that anyone had ever seen, so Lhuillier showed her eight dresses, and when Heidi saw her dress, she said, "This is it!"

Heidi hired one of the best.