Best Oscar Dresses: Frocks That Changed The Red Carpet (PHOTOS)

Ever since the inimitable Audrey Hepburn posed with her best actress Oscar (for 1953's "Roman Holiday") in an Edith Head dress tweaked to look like it was designed by Hubert de Givenchy (referred to as "Givenchy-fied"), designer frocks and the Academy Awards have belonged to together.

Hepburn, said to be "under the sway" of Givenchy (then the protege of legendary designer Cristobal Balenciaga), wore a nearly identical dress in the movie but had spaghetti straps added to the white-on-white floral dress and the back lowered. It is said the then-starlet considered the dress "lucky." The dress sold at auction for $130,000 in 2011.

Givenchy went on to dress Hepburn for all her red carpet appearances and eventually even designed her film wardrobe _ notably for "Sabrina" in which some of the most beautiful dresses in cinema are featured _ cementing the relationship between fashion and film for all time. (No, really; the black, full skirted, V-back dress toward the end of "Sabrina" is a revelation. Really.)

Here are our picks for the most memorable Oscar looks for the past decade:

Red Carpet Game Changers

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PHOTOS (from MCT Photo Service, 202-383-6099):