Millie Bobby Brown, wearing a black and white Louis Vuitton gown, attends the 'Stranger Things' season four premiere in New York on May 14, 2022. EPA
Millie Bobby Brown, wearing a Mackintosh-style dress, speaks onstage at the 'Intruders' panel during the Summer Television Critics Association on July 9, 2014, in Beverly Hills, California. Getty Images
Millie Bobby Brown, wearing a black dress, attends the Bafta Los Angeles TV Tea Party on August 23, 2014, in Beverly Hills, California. Photo: FilmMagic
Millie Bobby Brown, wearing a golden tulle-skirted dress, attends the 'Stranger Things' premiere in Los Angeles on July 11, 2016. AP Photo
Millie Bobby Brown, wearing a ruffled white shirt, speaks at a 'Stranger Things' event in Beverly Hills on July 27, 2016. Photo: Netflix
Millie Bobby Brown, wearing a striped green shirt and black jeans, attends Asia Pop Comic Con 2016 in Manila, Philippines, on August 28, 2016. Getty Images
Millie Bobby Brown, wearing a white dress with black detail, appears on the 'Tonight Show Starring Jimmy Fallon' in New York City on August 31, 2016. Getty Images
Millie Bobby Brown, in a taupe dress, at an ICM brunch in Santa Monica on September 17, 2016. Getty Images
Millie Bobby Brown, wearing a floral shift dress, attends the BBC America Bafta Los Angeles TV Tea Party in Hollywood on September 17, 2016. Photo: WireImage
Millie Bobby Brown, wearing head-to-toe Coach, arrives at the 'Late Show With Stephen Colbert' studios in New York City on September 13, 2016. Photo: GC Images
Millie Bobby Brown, wearing a floral Kate Spade dress, attends the 70th Unicef Anniversary at the United Nations Headquarters in New York on December 12, 2016. EPA
Millie Bobby Brown, wearing a silver sequined dress, arrives for the Golden Globe Awards in Beverly Hills on January 8, 2017. EPA
Millie Bobby Brown, wearing red Giorgio Armani, arrives for the Screen Actors Guild Awards in Los Angeles on January 29, 2017. EPA
Millie Bobby Brown, wearing white Calvin Klein with cowboy boots, attends the MTV Movie & TV Awards in Los Angeles on May 7, 2017. EPA
Millie Bobby Brown, wearing an ivory embellished dress, to attend a 'Stranger Things' event in Los Angeles on June 6, 2017. AP Photo
Millie Bobby Brown, wearing yellow Kenzo, arrives for the Teen Choice Awards in Los Angeles on August 13, 2017. EPA
Millie Bobby Brown, wearing a tulle black and gold dress, attends the MTV Video Music Awards in Inglewood, California, on August 27, 2017. Getty Images
Millie Bobby Brown, wearing a cream Calvin Klein princess dress, arrives for the Primetime Emmy Awards in Los Angeles on September 17, 2017. EPA
Millie Bobby Brown, wearing leather Calvin Klein, arrives at the 'Stranger Things' season two premiere in Los Angeles on October 26, 2017. Photo: FilmMagic
Millie Bobby Brown, in pink Sies Marjan, arrives at the 'Extra' studios in Hollywood on October 27, 2017. Getty Images
Millie Bobby Brown, wearing a Rodarte skirt and crop top, with a sequined bomber jacket, arrives at Build Studio on October 31, 2017, in New York City. Getty Images
Millie Bobby Brown, wearing shorts and a jacket by Giambattista Valli, arrives at 'TRL' on November 1, 2017 in New York City. Photo: GC Images
Millie Bobby Brown, wearing black Calvin Klein, arrives for the Golden Globe Awards on January 7, 2018. EPA
Millie Bobby Brown, wearing a pink sequined Calvin Klein dress with Converse shoes, arrives for the Screen Actors Guild Awards in Los Angeles on January 21, 2018. EPA
Millie Bobby Brown, wearing a Moncler Genius gown, attends the brand's Milan Fashion Week show on February 20, 2018. Getty Images
Millie Bobby Brown, wearing a black and white polka-dot dress by Rodarte, attends The Brit Awards 2018 in London on February 21, 2018. Getty Images
Millie Bobby Brown, wearing a black and white starry Oscar de la Renta gown, at the PaleyFest ceremony in Los Angeles on March 25, 2018. Getty Images
Millie Bobby Brown, wearing floral Dolce & Gabbana, arrives for the Time 100 Gala in New York on April 24, 2018. EPA
Millie Bobby Brown, wearing a black jumpsuit by Rosie Assoulin, attends the MTV Video Music Awards in New York on August 20, 2018. EPA
Millie Bobby Brown, wearing an off-the-shoulder pink floral gown by Calvin Klein, attends the Primetime Emmy Awards in Los Angeles on September 17, 2018. EPA
Millie Bobby Brown, wearing a black embellished Oscar de la Renta gown, attends the 'Godzilla: King of The Monsters' premiere in Hollywood on May 18, 2019. EPA
Millie Bobby Brown, wearing dusty pink tulle by Christian Dior, attends the 'Godzilla: King of the Monsters' premiere in London on May 28, 2019. Getty Images
Millie Bobby Brown, wearing a pink peplum skirt and cropped leather jacket by Louis Vuitton, attends a cocktail party hosted by the French fashion in Beverly Hills on June 27, 2019. Getty Images
Millie Bobby Brown, wearing ruffled pink Rodarte, attends the 'Stranger Things' season three premiere on June 28, 2019, in Santa Monica, California. Getty Images
Millie Bobby Brown, wearing white Givenchy with black ruffles, attends a 'Stranger Things' event in Hollywood on November 9, 2019. Getty Images
Millie Bobby Brown, wearing floral Markarian, attends a screening of 'Stranger Things' in New York City on November 11, 2019. Photo: FilmMagic
Millie Bobby Brown, wearing a lilac houndstooth belted two-piece by Thom Brown, speaks on Universal Children's Day at the United Nations headquarters in New York City on November 20, 2019. EPA
Millie Bobby Brown, wearing a white Louis Vuitton coat dress and trousers, attends the Screen Actors Guild Awards in Los Angeles on January 19, 2020. EPA
Millie Bobby Brown, wearing black Louis Vuitton, attends the British Academy Film Awards in London on March 13, 2022. Getty Images
Millie Bobby Brown, wearing purple Raisa Vanessa, while appearing on the 'Tonight Show Starring Jimmy Fallon' on May 13, 2022. Getty Images
Millie Bobby Brown, wearing a black and white Louis Vuitton gown, attends the 'Stranger Things' season four premiere in New York on May 14, 2022. EPA
Millie Bobby Brown, wearing a Mackintosh-style dress, speaks onstage at the 'Intruders' panel during the Summer Television Critics Association on July 9, 2014, in Beverly Hills, California. Getty Images
Millie Bobby Brown, wearing a black dress, attends the Bafta Los Angeles TV Tea Party on August 23, 2014, in Beverly Hills, California. Photo: FilmMagic
Millie Bobby Brown, wearing a golden tulle-skirted dress, attends the 'Stranger Things' premiere in Los Angeles on July 11, 2016. AP Photo
Millie Bobby Brown, wearing a ruffled white shirt, speaks at a 'Stranger Things' event in Beverly Hills on July 27, 2016. Photo: Netflix
Millie Bobby Brown, wearing a striped green shirt and black jeans, attends Asia Pop Comic Con 2016 in Manila, Philippines, on August 28, 2016. Getty Images
Millie Bobby Brown, wearing a white dress with black detail, appears on the 'Tonight Show Starring Jimmy Fallon' in New York City on August 31, 2016. Getty Images
Millie Bobby Brown, in a taupe dress, at an ICM brunch in Santa Monica on September 17, 2016. Getty Images
Millie Bobby Brown, wearing a floral shift dress, attends the BBC America Bafta Los Angeles TV Tea Party in Hollywood on September 17, 2016. Photo: WireImage
Millie Bobby Brown, wearing head-to-toe Coach, arrives at the 'Late Show With Stephen Colbert' studios in New York City on September 13, 2016. Photo: GC Images
Millie Bobby Brown, wearing a floral Kate Spade dress, attends the 70th Unicef Anniversary at the United Nations Headquarters in New York on December 12, 2016. EPA
Millie Bobby Brown, wearing a silver sequined dress, arrives for the Golden Globe Awards in Beverly Hills on January 8, 2017. EPA
Millie Bobby Brown, wearing red Giorgio Armani, arrives for the Screen Actors Guild Awards in Los Angeles on January 29, 2017. EPA
Millie Bobby Brown, wearing white Calvin Klein with cowboy boots, attends the MTV Movie & TV Awards in Los Angeles on May 7, 2017. EPA
Millie Bobby Brown, wearing an ivory embellished dress, to attend a 'Stranger Things' event in Los Angeles on June 6, 2017. AP Photo
Millie Bobby Brown, wearing yellow Kenzo, arrives for the Teen Choice Awards in Los Angeles on August 13, 2017. EPA
Millie Bobby Brown, wearing a tulle black and gold dress, attends the MTV Video Music Awards in Inglewood, California, on August 27, 2017. Getty Images
Millie Bobby Brown, wearing a cream Calvin Klein princess dress, arrives for the Primetime Emmy Awards in Los Angeles on September 17, 2017. EPA
Millie Bobby Brown, wearing leather Calvin Klein, arrives at the 'Stranger Things' season two premiere in Los Angeles on October 26, 2017. Photo: FilmMagic
Millie Bobby Brown, in pink Sies Marjan, arrives at the 'Extra' studios in Hollywood on October 27, 2017. Getty Images
Millie Bobby Brown, wearing a Rodarte skirt and crop top, with a sequined bomber jacket, arrives at Build Studio on October 31, 2017, in New York City. Getty Images
Millie Bobby Brown, wearing shorts and a jacket by Giambattista Valli, arrives at 'TRL' on November 1, 2017 in New York City. Photo: GC Images
Millie Bobby Brown, wearing black Calvin Klein, arrives for the Golden Globe Awards on January 7, 2018. EPA
Millie Bobby Brown, wearing a pink sequined Calvin Klein dress with Converse shoes, arrives for the Screen Actors Guild Awards in Los Angeles on January 21, 2018. EPA
Millie Bobby Brown, wearing a Moncler Genius gown, attends the brand's Milan Fashion Week show on February 20, 2018. Getty Images
Millie Bobby Brown, wearing a black and white polka-dot dress by Rodarte, attends The Brit Awards 2018 in London on February 21, 2018. Getty Images
Millie Bobby Brown, wearing a black and white starry Oscar de la Renta gown, at the PaleyFest ceremony in Los Angeles on March 25, 2018. Getty Images
Millie Bobby Brown, wearing floral Dolce & Gabbana, arrives for the Time 100 Gala in New York on April 24, 2018. EPA
Millie Bobby Brown, wearing a black jumpsuit by Rosie Assoulin, attends the MTV Video Music Awards in New York on August 20, 2018. EPA
Millie Bobby Brown, wearing an off-the-shoulder pink floral gown by Calvin Klein, attends the Primetime Emmy Awards in Los Angeles on September 17, 2018. EPA
Millie Bobby Brown, wearing a black embellished Oscar de la Renta gown, attends the 'Godzilla: King of The Monsters' premiere in Hollywood on May 18, 2019. EPA
Millie Bobby Brown, wearing dusty pink tulle by Christian Dior, attends the 'Godzilla: King of the Monsters' premiere in London on May 28, 2019. Getty Images
Millie Bobby Brown, wearing a pink peplum skirt and cropped leather jacket by Louis Vuitton, attends a cocktail party hosted by the French fashion in Beverly Hills on June 27, 2019. Getty Images
Millie Bobby Brown, wearing ruffled pink Rodarte, attends the 'Stranger Things' season three premiere on June 28, 2019, in Santa Monica, California. Getty Images
Millie Bobby Brown, wearing white Givenchy with black ruffles, attends a 'Stranger Things' event in Hollywood on November 9, 2019. Getty Images
Millie Bobby Brown, wearing floral Markarian, attends a screening of 'Stranger Things' in New York City on November 11, 2019. Photo: FilmMagic
Millie Bobby Brown, wearing a lilac houndstooth belted two-piece by Thom Brown, speaks on Universal Children's Day at the United Nations headquarters in New York City on November 20, 2019. EPA
Millie Bobby Brown, wearing a white Louis Vuitton coat dress and trousers, attends the Screen Actors Guild Awards in Los Angeles on January 19, 2020. EPA
Millie Bobby Brown, wearing black Louis Vuitton, attends the British Academy Film Awards in London on March 13, 2022. Getty Images
Millie Bobby Brown, wearing purple Raisa Vanessa, while appearing on the 'Tonight Show Starring Jimmy Fallon' on May 13, 2022. Getty Images
Millie Bobby Brown, wearing a black and white Louis Vuitton gown, attends the 'Stranger Things' season four premiere in New York on May 14, 2022. EPA