D23 Expo: Mandy Moore, Kristen Bell, Reese Witherspoon and more stars hit Disney's red carpet

Disney's annual D23 Expo is about movies, not fashion -- but you can't have a star-studded event without style!

Disney boasts an A-list celebrity roster, thanks in large part to its ownership of the Marvel superhero franchises: Robert Downey Jr., Benedict Cumberbatch and Chris Hemsworth all looked handsome as ever promoting their upcoming "Avengers: Infinity War."

But of course, the best style moments came from the ladies! Best-dressed has to go to "Tangled" star Mandy Moore, who was a real-life princess in a calf-length seersucker frock. With ruffled sleeves and lace detail, the dress was a modern take on Cinderella's classic look.

Reese Witherspoon, Mindy Kaling and Oprah Winfrey took the stage together, and -- it must be said -- two of the three disappointed on the red carpet. Oprah's wedges and vest looked more wacky than whimsical, and Reese underwhelmed in a simple cap-sleeved number. But give it up for Mindy Kaling, whose lovely B&W look was appropriately mysterious for the trio's upcoming "A Wrinkle In Time"!

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D23 Expo: Celebrity Arrivals
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D23 Expo: Celebrity Arrivals
D23 EXPO 2017 - Sunday, July 16, 2017 - The Ultimate Disney Fan Event - brings together all the worlds of Disney under one roof for three packed days of presentations, pavilions, experiences, concerts, sneak peeks, shopping, and more. The event, which takes place July 14-16 at the Anaheim Convention Center, provides fans with unprecedented access to Disney films, television, games, theme parks, and celebrities. (Image Group LA / Disney via Getty Images) MANDY MOORE
D23 EXPO 2017 - Saturday, July 15, 2017 - The Ultimate Disney Fan Event - brings together all the worlds of Disney under one roof for three packed days of presentations, pavilions, experiences, concerts, sneak peeks, shopping, and more. The event, which takes place July 14-16 at the Anaheim Convention Center, provides fans with unprecedented access to Disney films, television, games, theme parks, and celebrities. Image Group LA via Getty Images MINDY KALING, OPRAH WINFREY, REESE WITHERSPOON
ANAHEIM, CA - JULY 15: Actor Reese Witherspoon (L) and director Ava DuVernay of A WRINKLE IN TIME took part today in the Walt Disney Studios live action presentation at Disney's D23 EXPO 2017 in Anaheim, Calif. A WRINKLE IN TIME will be released in U.S. theaters on March 9, 2018. (Photo by Alberto E. Rodriguez/Getty Images for Disney)
ANAHEIM, CA - JULY 15: Actor Reese Witherspoon of A WRINKLE IN TIME took part today in the Walt Disney Studios live action presentation at Disney's D23 EXPO 2017 in Anaheim, Calif. A WRINKLE IN TIME will be released in U.S. theaters on March 9, 2018. (Photo by Alberto E. Rodriguez/Getty Images for Disney)
ANAHEIM, CA - JULY 15: Actor Oprah Winfrey of A WRINKLE IN TIME took part today in the Walt Disney Studios live action presentation at Disney's D23 EXPO 2017 in Anaheim, Calif. A WRINKLE IN TIME will be released in U.S. theaters on March 9, 2018. (Photo by Alberto E. Rodriguez/Getty Images for Disney)
ANAHEIM, CA - JULY 15: Actor Mindy Kaling of A WRINKLE IN TIME took part today in the Walt Disney Studios live action presentation at Disney's D23 EXPO 2017 in Anaheim, Calif. A WRINKLE IN TIME will be released in U.S. theaters on March 9, 2018. (Photo by Alberto E. Rodriguez/Getty Images for Disney)
ANAHEIM, CA - JULY 15: (L-R) Actors Don Cheadle, Benedict Cumberbatch and Chadwick Boseman of AVENGERS: INFINITY WAR took part today in the Walt Disney Studios live action presentation at Disney's D23 EXPO 2017 in Anaheim, Calif. AVENGERS: INFINITY WAR will be released in U.S. theaters on May 4, 2018. (Photo by Alberto E. Rodriguez/Getty Images for Disney)
ANAHEIM, CA - JULY 15: Actor Benedict Cumberbatch of AVENGERS: INFINITY WAR took part today in the Walt Disney Studios live action presentation at Disney's D23 EXPO 2017 in Anaheim, Calif. AVENGERS: INFINITY WAR will be released in U.S. theaters on May 4, 2018. (Photo by Alberto E. Rodriguez/Getty Images for Disney)
D23 EXPO 2017 - Friday, July 14, 2017 - The Ultimate Disney Fan Event - brings together all the worlds of Disney under one roof for three packed days of presentations, pavilions, experiences, concerts, sneak peeks, shopping, and more. The event, which takes place July 14-16 at the Anaheim Convention Center, provides fans with unprecedented access to Disney films, television, games, theme parks, and celebrities. (Image Group LA / Disney via Getty Images) JOSH GAD, KRISTEN BELL
D23 EXPO 2017 - Friday, July 14, 2017 - The Ultimate Disney Fan Event - brings together all the worlds of Disney under one roof for three packed days of presentations, pavilions, experiences, concerts, sneak peeks, shopping, and more. The event, which takes place July 14-16 at the Anaheim Convention Center, provides fans with unprecedented access to Disney films, television, games, theme parks, and celebrities. (Image Group LA / Disney via Getty Images) KRISTEN BELL
D23 EXPO 2017 - Saturday, July 15, 2017 - The Ultimate Disney Fan Event - brings together all the worlds of Disney under one roof for three packed days of presentations, pavilions, experiences, concerts, sneak peeks, shopping, and more. The event, which takes place July 14-16 at the Anaheim Convention Center, provides fans with unprecedented access to Disney films, television, games, theme parks, and celebrities. (Image Group LA / Disney via Getty Images) MARK RUFFALO
D23 EXPO 2017 - Saturday, July 15, 2017 - The Ultimate Disney Fan Event - brings together all the worlds of Disney under one roof for three packed days of presentations, pavilions, experiences, concerts, sneak peeks, shopping, and more. The event, which takes place July 14-16 at the Anaheim Convention Center, provides fans with unprecedented access to Disney films, television, games, theme parks, and celebrities. (Image Group LA / Disney via Getty Images) TOM HOLLAND
D23 EXPO 2017 - Saturday, July 15, 2017 - The Ultimate Disney Fan Event - brings together all the worlds of Disney under one roof for three packed days of presentations, pavilions, experiences, concerts, sneak peeks, shopping, and more. The event, which takes place July 14-16 at the Anaheim Convention Center, provides fans with unprecedented access to Disney films, television, games, theme parks, and celebrities. (Image Group LA / Disney via Getty Images) ELIZABETH OLSEN
D23 EXPO 2017 - Saturday, July 15, 2017 - The Ultimate Disney Fan Event - brings together all the worlds of Disney under one roof for three packed days of presentations, pavilions, experiences, concerts, sneak peeks, shopping, and more. The event, which takes place July 14-16 at the Anaheim Convention Center, provides fans with unprecedented access to Disney films, television, games, theme parks, and celebrities. Image Group LA via Getty Images DON CHEADLE
D23 EXPO 2017 - Friday, July 14, 2017 - The Ultimate Disney Fan Event - brings together all the worlds of Disney under one roof for three packed days of presentations, pavilions, experiences, concerts, sneak peeks, shopping, and more. The event, which takes place July 14-16 at the Anaheim Convention Center, provides fans with unprecedented access to Disney films, television, games, theme parks, and celebrities. (Image Group LA / Disney via Getty Images) AULI'I CRAVALHO
ANAHEIM, CA - JULY 14: (L-R) Actors Paige O'Hara (Belle/BEAUTY AND THE BEAST), Irene Bedard (POCAHONTAS), Mandy Moore (Rapunzel/TANGLED), Auli'i Cravalho (MOANA), Sarah Silverman (Vanellope von Schweetz/RALPH BREAKS THE INTERNET: WRECK-IT RALPH 2), Kristen Bell (Anna/FROZEN), Kelly Macdonald (Merida/BRAVE), Anika Noni Rose (Tiana/THE PRINCESS AND THE FROG), Linda Larkin (Jasmine/ALADDIN), and Jodi Benson (Ariel/THE LITTLE MERMAID) of RALPH BREAKS THE INTERNET: WRECK-IT RALPH 2 took part today in the Walt Disney Studios animation presentation at Disney's D23 EXPO 2017 in Anaheim, Calif. RALPH BREAKS THE INTERNET: WRECK-IT RALPH 2 will be released in U.S. theaters on November 21, 2018. (Photo by Alberto E. Rodriguez/Getty Images for Disney)
D23 EXPO 2017 - Saturday, July 15, 2017 - The Ultimate Disney Fan Event - brings together all the worlds of Disney under one roof for three packed days of presentations, pavilions, experiences, concerts, sneak peeks, shopping, and more. The event, which takes place July 14-16 at the Anaheim Convention Center, provides fans with unprecedented access to Disney films, television, games, theme parks, and celebrities. (Image Group LA / Disney via Getty Images) DAISY RIDLEY
ANAHEIM, CA - JULY 15: (L-R) Actors Sebastian Stan, Dave Bautista, Karen Gillan, Pom Klementieff, Benedict Cumberbatch, Chadwick Boseman, Josh Brolin, and Chris Hemsworth, producer Kevin Feige, and actors Robert Downey Jr., Mark Ruffalo, Tom Holland, Elizabeth Olsen, Paul Bettany, Don Cheadle, and Anthony Mackie of AVENGERS: INFINITY WAR took part today in the Walt Disney Studios live action presentation at Disney's D23 EXPO 2017 in Anaheim, Calif. AVENGERS: INFINITY WAR will be released in U.S. theaters on May 4, 2018. (Photo by Jesse Grant/Getty Images for Disney)
ANAHEIM, CA - JULY 15: (L-R) Actors Sebastian Stan, Don Cheadle and Benedict Cumberbatch of AVENGERS: INFINITY WAR, John Boyega of STAR WARS: THE LAST JEDI, and Tom Holland, Chadwick Boseman and Anthony Mackie of AVENGERS: INFINITY WAR took part today in the Walt Disney Studios live action presentation at Disney's D23 EXPO 2017 in Anaheim, Calif. STAR WARS: THE LAST JEDI will be released in U.S. theaters on December 15, 2017; AVENGERS: INFINITY WAR will be released in U.S. theaters on May 4, 2018. (Photo by Alberto E. Rodriguez/Getty Images for Disney)
Anaheim, CA – Karen Gillan attends Disney's D23 EXPO 2017 wearing the Vittore Marquise Ring, White, Rhodium Plating and the Hint Double Ring from the Swarovski Fall/Winter 2017 Collection.
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The three-day convention took place in Anaheim, CA, giving guests exclusive looks into Disney's highly-anticipated upcoming releases. Among the biggest announcements were the newly-confirmed "Aladdin" cast, details about sequels like "Frozen 2" and "The Incredibles 2," and awesome updates from the Lucasfilm and Pixar teams.

Even more details are expected to become public later this month at Comic-Con, where fans will have their fingers crossed for the official "Avengers: Infinity War" trailer.

RELATED: "A Wrinkle In Time" star Reese Witherspoon and her lookalike teen daughter

15 PHOTOS
Reese Witherspoon and lookalike daughter Ava Phillippe
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Reese Witherspoon and lookalike daughter Ava Phillippe
BEVERLY HILLS, CA - JUNE 06: Ava Elizabeth Phillippe and Reese Witherspoon attend NET-A-PORTER x Draper James Event on June 6, 2017 in Beverly Hills, California. (Photo by Stefanie Keenan/Getty Images for NET-A-PORTER)
BEVERLY HILLS, CA - JUNE 06: Ava Elizabeth Phillippe attends NET-A-PORTER x Draper James Event on June 6, 2017 in Beverly Hills, California. (Photo by Stefanie Keenan/Getty Images for NET-A-PORTER)
#GoldenHour with the kiddos ⛅️💓
🌷🌷🌷
With my ❤️always @avaphillippe .. #MotherDaughter #MatchyMatchy #Premiere #BigLittleLies
Celebrating our sweet Tennessee’s 4th birthday last night! 🎂🎈🎉 My forever favorite #NinjaTurtle 💋🐢 #TMNT #FamilySandwich
There’s nothing better than celebrating my birthday with my wonderful kids! 💖🎂💖 #ProudMom
HOLLYWOOD, CA - FEBRUARY 07: Ava Elizabeth Phillippe (L) and actress Reese Witherspoon attend the premiere of HBO's 'Big Little Lies' at TCL Chinese Theatre on February 7, 2017 in Hollywood, California. (Photo by C Flanigan/Getty Images)
LOS ANGELES, CA - FEBRUARY 07: Ava Elizabeth Phillippe (L) and actor Reese Witherspoon attend the premiere of HBO's 'Big Little Lies' at the TCL Chinese Theater on February 7, 2017 in Hollywood, California. (Photo by Jeff Kravitz/FilmMagic)
LOS ANGELES, CA - OCTOBER 30: Honoree Reese Witherspoon (L) and Ava Phillippe attend with FIJI Water at 29th American Cinematheque Awards honoring Reese Witherspoon on October 30, 2015 in Los Angeles, California. (Photo by Charley Gallay/Getty Images for FIJI Water)
LOS ANGELES, CA - OCTOBER 30: Actress Reese Witherspoon, daughter Ava Phillippe (L) and son Deacon Phillippe (R) arrive at the 29th American Cinematheque Award Honoring Reese Witherspoon at the Hyatt Regency Century Plaza on October 30, 2015 in Los Angeles, California. (Photo by Jon Kopaloff/FilmMagic)
LOS ANGELES, CA - SEPTEMBER 07: Reese Witherspoon takes her daughter Ava Phillipe and son Tennessee Toth to the country market in Brentwood on September 07, 2013 in Los Angeles, California. (Photo by Bauer-Griffin/GC Images)
dusty
Me and my girl 💖 #Happy2017
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