February 22, 2016 4:16 PM EST

Over the years, the Oscars red carpet has been home to indelible moments in fashion. Beauty and poise are expected on the red carpet, and the designs seen there will eventually find their way to shops. But in spite of its rich history, few dresses and looks have survived the changing trends to become iconic.

Take for example, the floral sheath dress by designer Hubert de Givenchy that Audrey Hepburn wore in 1954 or the vintage Valentino dress Julia Roberts donned in 2001. Both actresses took home the golden statue those years.

These were magical and authentic moments that will continue to resonate in fashion, said Eric Wilson, fashion news director of InStyle. But what made Hepburn’s 1954 and Roberts’ 2001 appearance so memorable? Watch the video above to find out.

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