Jennifer Lopez
For the 2015 affair, JLo made sure all eyes were on her as she stunned in this glitzy Elie Saab dress.
Julia Roberts
The Oscar-winning actress may have taken home the award in 2001 for Erin Brockovich but her satin vintage Valentino gown stole the show. The black and white number was from the brand's 1982 collection.
Lady Gaga
The A Star is Born actress looked effortlessly elegant in a white pantsuit dress by Brandon Maxwell.
Zoe Saldana
Wearing a custom Atelier Versace design, the Guardians of the Galaxy actress stunned in a blush-colored, body-hugging gown.
Emilia Jones
To celebrate CODA's success, the actress wore a stunning gold dress from Dolce and Gabbana.
Salma Hayek
The Frida alum stunned on the Oscars red carpet in a vibrant ocean-blue Atelier Versace gown.
Margot Robbie
The Aussie actress exuded old-Hollywood glamour in her full-length, long-sleeve gown.
Lupita Nyong'o
The Oscar winner graced the 2015 red carpet in a beautifully pearl-beaded gown by Calvin Klein.
Debbie Allen
Debbie Allen wowed the crowd with her performance at the 54th Annual Awards and her eye-catching lavender gown.
Penélope Cruz
The actress made a rosy entrance with her blush-colored Atelier Versace gown, which featured a chiffon bodice with an organza tulle train.
Gina Rodriguez
The Jane the Virgin alum brought the glitz and the glamour to the 2018 awards show with her bedazzled Zuhair Murad gown.
Meryl Streep
The legendary star holds the record for having the most Academy Award nominations of any actor, and her 2012 ensemble was just as noteworthy as her accomplishments. She dazzled in a gold lamé gown by Lanvin.
Audrey Hepburn
The iconic actress is known for her elegant and timeless ensembles, and her 1954 Oscars dress is the epitome of her exquisite fashion. She wore a white floral dress by Hubert de Givenchy.
Reese Witherspoon
The Big Little Lies actress had her Cinderella moment at the 2006 ceremony, looking like a princess in her 1955 Christian Dior gown, which she found at a Paris vintage boutique. Rumor has it, the boutique owner had a tough time parting ways with it because it once belonged to royalty.
Tessa Thompson
The actress wrapped herself in gold, wearing a dazzling strapless gown at the 2019 ceremony.