John Locher/AP
  • Janelle Monae in Ralph Lauren

    Janelle Monae in Ralph Lauren
    Janelle Monae arrives at the Oscars, Feb. 9, 2020, in Hollywood, Calif.
    John Locher/AP
  • Billy Porter in Christian Siriano

    Billy Porter in Christian Siriano
    Billy Porter attends the 91st annual Academy Awards at Hollywood and Highland, Feb. 24, 2019, in Hollywood, Calif.
    Dan Macmedan/Getty Images, FILE
  • Gemma Chan in Valentino

    Gemma Chan in Valentino
    Gemma Chan arrives at the 91st Annual Academy Awards, Feb. 24, 2019, in Hollywood, Calif.
    Steve Granitz/WireImage/Getty Images
  • Lady Gaga in Alexander McQueen

    Lady Gaga in Alexander McQueen
    Lady Gaga attends the 91st Annual Academy Awards, Feb. 24, 2019, in Hollywood, Calif.
    Frazer Harrison/Getty Images
  • Nicole Kidman in Armani Prive

    Nicole Kidman in Armani Prive
    Nicole Kidman attends the 90th Annual Academy Awards, March 4, 2018, in Hollywood, Calif.
    Dan MacMedan/WireImage/Getty Images
  • Saoirse Ronan in Calvin Klein By Appointment

    Saoirse Ronan in Calvin Klein By Appointment
    Saoirse Ronan arrives at the 90th Annual Academy Awards, March 4, 2018, in Hollywood, Calif.
    Steve Granitz/WireImage/Getty Images
  • Janelle Monae in Elie Saab

    Janelle Monae in Elie Saab
    Janelle Monae arrives at the 89th Annual Academy Awards at Hollywood & Highland Center, Feb. 26, 2017, Hollywood, Calif.
    Steve Granitz/WireImage/Getty Images
  • Margot Robbie in Tom Ford

    Margot Robbie in Tom Ford
    Margot Robbie attends the 88th Annual Academy Awards at Hollywood & Highland Center, Feb. 28, 2016, in Hollywood, California.
    Dan MacMedan/WireImage/Getty Images
  • Brie Larson in Gucci

    Brie Larson in Gucci
    Brie Larson attends the 88th Annual Academy Awards at Hollywood & Highland Center, Feb. 28, 2016, in Hollywood, California.
    Dan MacMedan/WireImage/Getty Images
  • Emma Stone in Elie Saab

    Emma Stone in Elie Saab
    Emma Stone arrives at the 87th Annual Academy Awards at Hollywood & Highland Center, Feb. 22, 2015, in Hollywood, Calif.
    Steve Granitz/WireImage/Getty Images
  • Cate Blanchett in Armani Prive

    Cate Blanchett in Armani Prive
    Actress Cate Blanchett winner of Best Performance by an Actress in a Leading Role poses in the press room during the 86th Annual Academy Awards at Loews Hollywood Hotel, March 2, 2014, in Hollywood, Calif.
    Jeffrey Mayer/WireImage/Getty Images
  • Lupita Nyong'o in Christian Dior

    Lupita Nyong'o in Christian Dior
    Lupita Nyong'o attends the Oscars held at Hollywood & Highland Center, March 2, 2014, in Hollywood, Calif.
    Jason Merritt/Getty Images
  • Jennifer Lawrence in Christian Dior

    Jennifer Lawrence in Christian Dior
    Jennifer Lawrence arrives at the Oscars at Hollywood & Highland Center, Feb. 24, 2013, in Hollywood, Calif.
    Jason Merritt/Getty Images
  • Kerry Washington in Mui Mui

    Kerry Washington in Mui Mui
    Kerry Washington arrives at the 86th Annual Academy Awards at Hollywood & Highland Center, March 2, 2013, in Hollywood, Calif.
    ABC/Getty Images
  • Amy Adams in Oscar de la Renta

    Amy Adams in Oscar de la Renta
    Amy Adams arrives at the 85th Annual Academy Awards at Dolby Theatre, Feb. 24, 2013, in Hollywood, Calif.
    Jeffrey Mayer/Getty Images
  • Angelina Jolie in Atelier Versace

    Angelina Jolie in Atelier Versace
    Actress Angelina Jolie arrives at the 84th Annual Academy Awards held at the Hollywood & Highland Center, Feb. 26, 2012, in Hollywood, Calif.
    Ethan Miller/Getty Images
  • Octavia Spencer in Tadashi Shoji

    Octavia Spencer in Tadashi Shoji
    Actress Octavia Spencer arrives at the 84th Annual Academy Awards held at the Hollywood & Highland Center, Feb. 26, 2012, in Hollywood, Calif.
    Steve Granitz/Getty Images
  • Sandra Bullock in Marchesa

    Sandra Bullock in Marchesa
    Actress Sandra Bullock arrives at the 82nd Annual Academy Awards held at the Kodak Theatre on March 7, 2010 in Hollywood, Calif.
    Steve Granitz/Getty Images
  • Anne Hathaway in Armani Prive

    Anne Hathaway in Armani Prive
    Actress Anne Hathaway arrives at the 81st Academy Awards at the Kodak Theater in Hollywood, Calif., Feb. 22, 2009.
    Robyn Beck/AFP/Getty Images
  • Marion Cotillard in Jean-Paul Gaultier

    Marion Cotillard in Jean-Paul Gaultier
    Actress Marion Cotillard arrives at the 80th Annual Academy Awards, Feb. 24, 2008, in Hollywood, California.
    Frazer Harrison/Getty Images
  • Penelope Cruz in Versace

    Penelope Cruz in Versace
    Penelope Cruz, nominee Best Actress in a Leading Role for "Volver," attends the 79th Annual Academy Awards, Feb. 25, 2007, in Hollywood, Calif.
    WireImage
  • Reese Witherspoon in Vintage Christian Dior

    Reese Witherspoon in Vintage Christian Dior
    Reese Witherspoon, nominee for Best Actress in a Leading Role for "Walk the Line," attends the 78th Annual Academy Awards, March 5, 2006, in Hollywood, Calif.
    KMazur/Getty Images
  • Natalie Portman in Lanvin

    Natalie Portman in Lanvin
    Natalie Portman attends the 77th Annual Academy Awards at the Kodak Theatre in Los Angeles, Feb. 27, 2005.
    Jeff Kravitz/FilmMagic/Getty Images
  • Michelle Williams in Valentino Couture

    Michelle Williams in Valentino Couture
    Michelle Williams, nominee Best Actress in a Supporting Role for "Brokeback Mountain" at the The 78th Annual Academy Awards in Hollywood, California.
    Chris Polk/Getty Images
  • Hilary Swank in Laroche

    Hilary Swank in Laroche
    Hilary Swank, nominated for Best Actress for her role in "Million Dollar Baby," arrives for the 77th Academy Awards, Feb. 27, 2005, at the Kodak Theater in Hollywood, Calif
    Gerard Burkhart/AFP/Getty Images
  • Charlize Theron in Gucci

    Charlize Theron in Gucci
    Charlize Theron attends the 76th Annual Academy Awards held at the The Kodak Theater, Feb. 29, 2004, in Hollywood, California.
    Steve Granitz/WireImage/Getty Images
  • Jennifer Lopez in Valentino

    Jennifer Lopez in Valentino
    Jennifer Lopez arrives at the 75th Annual Academy Awards, March 23, 2003, in Hollywood, Calif.
    Bob Riha Jr/Getty Images
  • Halle Berry in Elie Saab

    Halle Berry in Elie Saab
    Halle Berry attends the 74th Annual Academy Awards held at the Kodak Theater, March 24, 2002, in Hollywood, Calif.
    Steve Granitz/WireImage/Getty Images
  • Julia Roberts in Vintage Valentino

    Julia Roberts in Vintage Valentino
    Julia Roberts poses with her Best Actress Oscar for her role "Erin Brockovich" at the 73rd Annual Academy Awards, March 25, 2001, in Hollywood, Calif.
    Terry McGinnis/WireImage/Getty Images
  • Bjork in Marjan Pejoski

    Bjork in Marjan Pejoski
    Bjork attends the 73rd Annual Academy Awards at Shrine Auditorium in Los Angeles, California, March 25, 2001.
    Mirek Towski/FilmMagic/Getty Images
  • Gwyneth Paltrow in Ralph Lauren

    Gwyneth Paltrow in Ralph Lauren
    Gwyneth Paltrow attends the 71st Annual Academy Awards, March 21, 1999, in Hollywood, Calif.
    Jeffrey Mayer/WireImage/Getty Images
  • Susan Sarandon in Dolce & Gabbana

    Susan Sarandon in Dolce & Gabbana
    Susan Sarandon poses holding her Best Actress trophy for her role in the film 'Dead Man Walking' at the 68th Annual Academy Awards held in Los Angeles, March 25, 1996.
    Getty Images
  • Sharon Stone in Vera Wang Skirt

    Sharon Stone in Vera Wang Skirt
    Sharon Stone and Phil Bronstein attend the 1998 Academy Awards in Los Angeles.
    Jeff Kravitz/Getty Images
  • Cindy Crawford in Versace

    Cindy Crawford in Versace
    Cindy Crawford, accompanied by actor Richard Gere, attends the 63rd Annual Academy Awards, March 25, 1991, in Hollywood, Calif.
    Ron Galella/WireImage/Getty Images
  • Madonna in Bob Mackie

    Madonna in Bob Mackie
    Madonna attends the 63rd Annual Academy Awards, March 25, 1991, in Los Angeles.
    Ron Galella/WireImage/Getty Images
  • Cher in Bob Mackie

    Cher in Bob Mackie
    Cher is seen backstage at the 58th annual Academy Awards in Los Angeles, March 24, 1986.
    Bettmann Archive/Getty Images
  • Drew Barrymore in Jaid Barrymore

    Drew Barrymore in Jaid Barrymore
    Drew Barrymore and her mother attend the Oscar Awards, April 11, 1983, in Hollywood, Calif.
    Bertrand Rindoff Petroff/Getty Images
  • Farah Fawcett in Stephen Burrows

    Farah Fawcett in Stephen Burrows
    Farah Fawcett presents an award at the 50th Annual Academy Awards, April 3, 1978, in Hollywood, Calif.
    ABC Photo Archives/Getty Images
  • Barbra Streisand in Scaasi

    Barbra Streisand in Scaasi
    Barbra Streisand attends the 41st Annual Academy Awards at the Dorothy Chandler Pavillion in Los Angeles, April 14, 1969.
    Ron Galella/Getty Images
  • Grace Kelly in Edith Head

    Grace Kelly in Edith Head
    Oscar winners Grace Kelly and Marlon Brando pose with their statuettes, March 30, 1955.
    AP Photo
  • Audrey Hepburn in Givenchy

    Audrey Hepburn in Givenchy
    Oscar-winner Audrey Hepburn poses with her statuette at the 26th Annual Academy Awards ceremony in New York, March 25, 1954.
    AP Photo