While posing on the blue carpet, Phillippe debuted her chic new bob while wearing a black Valentino frock with red sequin hearts and ruffles, and Stella McCartney peep-toe pumps. Her freshly-cut tresses were sleek and parted to the side and her makeup consisted of a natural eye shadow and a hot pink pout.
Witherspoon looked equally as stunning in a powder blue Elie Saab long-sleeve dress with pearl detailing along the hemline. She accessorized the ensemble with silver Christian Louboutin heels, sapphire earrings and completed the look with her blonde locks slightly tousled and natural makeup.
19PHOTOS
Reese Witherspoon and lookalike daughter Ava Phillippe
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Reese Witherspoon and lookalike daughter Ava Phillippe
LONDON, UNITED KINGDOM - MARCH 13: Ava Phillippe and Reese Witherspoon attends the European Premiere of 'A Wrinkle In Time' at BFI IMAX on March 13, 2018 in London, England.
PHOTOGRAPH BY Jamy / Barcroft Images (Photo credit should read Jamy / Barcroft Media via Getty Images)
LONDON, ENGLAND - MARCH 13: Reese Witherspoon (R) and daughter Ava Phillippe (L) attend the European Premiere of 'A Wrinkle In Time' at BFI IMAX on March 13, 2018 in London, England. (Photo by Karwai Tang/WireImage)
LOS ANGELES, CA - FEBRUARY 26: Reese Witherspoon and Ava Phillippe arrive at the Los Angeles premiere of Disney's 'A Wrinkle In Time' held at El Capitan Theatre on February 26, 2018 in Los Angeles, California. (Photo by Michael Tran/FilmMagic)
LOS ANGELES, CA - FEBRUARY 26: Reese Witherspoon and Ava Phillippe arrive at the Los Angeles premiere of Disney's 'A Wrinkle In Time' held at El Capitan Theatre on February 26, 2018 in Los Angeles, California. (Photo by Michael Tran/FilmMagic)
WEST HOLLYWOOD, CA - DECEMBER 04: Reese Witherspoon and Ava Phillippe attend Molly R. Stern X Sarah Chloe Jewelry Collaboration Launch Dinner on December 4, 2017 in West Hollywood, California. (Photo by Stefanie Keenan/Getty Images for Sarah Chloe Jewelry)
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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Prior to arriving to the premiere, the Big Little Lies star shared a video of her and her daughter leaving their hotel.