Sydney Sweeney unveiled a striking new look that has captured the attention of fans and fashion watchers, revealing her latest hair transformation at the December 2 screening of her film The Housemaid in New York. Spotlighting the Sydney Sweeney hair transformation, her appearance brought together classic Hollywood glamour with a modern, retro twist, reflecting another major moment in her ever-evolving style.
Sydney Sweeney’s Glamorous Red Carpet Look
Sydney Sweeney stepped onto the red carpet in New York with her freshly styled, shoulder-grazing curls reminiscent of 1970s starlets. Staying true to her signature blonde but departing from her recent short bob, the Euphoria actress chose voluminous, Old Hollywood waves that evoked both elegance and nostalgia. Her outfit completed the aesthetic, with a silver Miu Miu gown, a white feather boa, and diamond-studded earrings blending together for a timeless yet fresh look.
Her Housemaid co-star Amanda Seyfried, known for her own adventurous style, wore a plunging pink Versace gown, a wavy side-part, and silver accessories, offering a complementary, attention-grabbing contrast on the red carpet.
A Bold Shift From Her Previous Styles
This recent transformation is a significant pivot from the sharp bob Sydney Sweeney showcased earlier in the year. She first debuted that look at Variety’s 2025 Power of Women ceremony, honoring her preparation to play professional boxer Christy Martin in the biopic Christy. On that occasion, her bob’s flipped ends and sheer Christian Cowan x Elias Matso dress reflected an edgier approach, capturing attention before she took on the physical demands of portraying Martin.
At the ceremony, Sweeney spoke candidly about the emotional journey behind her role and the empowerment she felt through her transformation, both stylistically and personally.
“I know what it feels like to be underestimated—to have people define you before you’ve had a chance to define yourself,”
Sydney said during the ceremony at the time.
“I know what it feels like to have to prove that you deserve to be here.”
—Sydney Sweeney, Actor
She continued,
“Christy reminds us all that strength doesn’t have to look loud sometimes, sometimes it’s just about getting back up again and again no matter who’s watching.”
—Sydney Sweeney, Actor
Sweeney’s commitment extended beyond looks; she trained hard, adopting a carb-rich diet and a rigorous fitness regimen over three and a half months in preparation for her boxing role.
“I came onboard to play Christy, and I had about three and a half months of training,”
she explained to W magazine in June.
“I started eating. I weight-trained in the morning for an hour, kickboxed midday for about two hours, and then weight-trained again at night for an hour.”
—Sydney Sweeney, Actor
By the time filming started, Sweeney noted the physical changes she experienced from her transformation. She admitted,
“didn’t fit in any of my clothes.”
—Sydney Sweeney, Actor
Despite these challenges, she described the process as rewarding:
“I was so strong, like crazy strong.”
—Sydney Sweeney, Actor
Other Celebrities Who Changed Their Hair in 2024–2025
Sydney Sweeney is not the only celebrity to debut a bold hair transformation this year; many stars across entertainment have reinvented themselves with dramatic new looks. Here is a closer look at some of the most memorable hair changes and the significance behind them:
Sami Sheen’s DIY Hair Journey
Sami Sheen, daughter of Charlie Sheen and Denise Richards, embraced an at-home hair coloring experience. She documented the highs and lows on TikTok and ultimately loved her updated hairstyle.
“I’ve been wanting to do this to my hair for years now,”
she said,
“and I’m so happy that I finally did it.”
—Sami Sheen
Carrie Underwood Returns to Her Roots
The country music star Carrie Underwood revealed a return to her natural hair color on Instagram in August 2025 after years as a blonde.
“Well, the last time I saw my natural hair color, I was probably about 12 years old, but I thought it might be time to give it a second chance.”
—Carrie Underwood
Jason Momoa’s Bold Change for Film
Actor Jason Momoa made headlines in July 2025 when he shaved off his beard for the first time in six years to prepare for the filming of Dune: Part Three, reprising his role as Duncan Idaho.
Kelly Clarkson’s New Look on The Voice
American Idol winner Kelly Clarkson surprised fans by introducing a shorter, darker bob haircut in a July 2025 The Voice promo, trading her well-known long blonde waves for a refreshing, sophisticated style.
Chris Pratt Debuts a Bearded Style
Chris Pratt, recognized for his roles in blockbuster films, unveiled a bearded look for the second season of The Terminal List in June 2025, adding a rugged dimension to his on-screen persona.
Finn Wolfhard Goes for a Buzzcut
The Stranger Things actor Finn Wolfhard swapped his signature shaggy hair for a buzzcut at the 2025 Crunchyroll Anime Awards in Tokyo, revealing a strikingly different image as he continues to evolve in the public eye.
Sebastian Stan Shows Off a Shaved Head
Marvel star Sebastian Stan said goodbye to Bucky Barnes’ long hair in April 2025, revealing a freshly shaved head at the Los Angeles premiere of Thunderbolts*.
JoJo Siwa’s Rainbow Mohawk Debut
Karma singer JoJo Siwa made a splash with a rainbow mohawk at the 2025 GLAAD Media Awards in March, reflecting her playful and expressive approach to personal style.
Emily Ratajkowski’s Edgy Shaggy Bangs
Model Emily Ratajkowski described her March 2025 haircut, featuring bold shaggy bangs, as the “worst haircut of my life,” but still showed off the transformation in a candid TikTok video.
Gypsy Rose Blanchard’s New Bob
The star of Gypsy Rose: Life After Lockup, Gypsy Rose Blanchard, debuted a short bob in March 2025 following the birth of her daughter Aurora Urker with fiancé Ken Urker, marking a fresh beginning in her personal and public journey.
Whitney Rose Embraces Red
Formerly blonde Real Housewives of Salt Lake City cast member Whitney Rose revealed a bold red bob on Watch What Happens Live in January 2025, demonstrating her willingness to experiment with vibrant hues.
Hailey Bieber’s Lightened Locks
Model Hailey Bieber, months after welcoming son Jack Blues Bieber with Justin Bieber, lightened her hair in September 2024, adding a luminous change to her well-documented style evolution.
Lily Collins Finds New Confidence with a Dramatic Cut
Lily Collins, star of Emily in Paris, showcased a fresh haircut at the world premiere of the movie MAXXXINE in June 2024.
“Changing my hair always brings out different sides of my personality and I love playing around,”
Lily told Vogue.
“This cut and color feels bolder and yet somehow lighter. And completely more me—right now.”
—Lily Collins, Actor
Katie Holmes Tries Caramel Highlights
Katie Holmes displayed a subtle yet impactful transformation with caramel balayage at Chanel’s Tribeca Film Festival Artists Dinner in June 2024, elevating her classic brunette locks.
Kylie Jenner Returns to Blonde, With ‘King Kylie’ Flair
Kylie Jenner made a dramatic shift from waist-length hair to a platinum blonde bob, harkening back to her iconic ‘King Kylie’ era with a playful nod to her roots. The transformation was met with enthusiasm by both fans and family.
“Did someone say they missed king kylie,”
Kylie teased in the caption of her June 8 Instagram post, to which her sister Khloe Kardashian cheekily replied, I did! I did!!!!!!
Lisa Rinna’s Paris Fashion Week Statement
Lisa Rinna debuted a platinum blonde hairstyle during the 2024 Paris Fashion Week Haute Couture, making a bold style statement on the international stage.
Priyanka Chopra’s Shorter Bob in Rome
The Heads of State actress Priyanka Chopra surprised fans at a Bulgari event in Rome in May 2024, revealing a shoulder-length bob that marked a significant change from her previous looks.
Jessica Biel’s Nostalgic Chop
Jessica Biel took to social media in May 2024 after cutting her hair into a chic bob reminiscent of her time as Mary Camden on the beloved ‘90s series 7th Heaven.
Megan Fox’s Series of Dramatic Colors and Cuts
Megan Fox showed off several transformations in 2024, from a return to her signature dark brown with a sassy bob in May to debuting a baby blue bob after a pink-haired ‘Jedi era’ earlier in the year. Each style marked a bold, distinct phase in the Transformers star’s image.
Dannielynn Birkhead’s Fresh Take at the Kentucky Derby
At 17, Dannielynn Birkhead introduced a new lob haircut at the 2024 Kentucky Derby, attending the event with her father Larry Birkhead and signaling her coming-of-age style moment in front of cameras.
Demi Lovato Opts for a Lighter, Shorter Look
Demi Lovato switched to a lighter, shorter hairstyle in April 2024, embracing a soft yet impactful style update.
Kelly Osbourne’s Blonde Bombshell Makeover
Known for her colorful hair history, Kelly Osbourne revealed a glamorous blonde look in early May 2024, continuing her tradition of eye-catching transformations.
Kim Kardashian’s Platinum Reboot
Kim Kardashian revisited her platinum blonde era with a striking new look in April 2024, aligning her public persona with high-fashion trends.
Rihanna Celebrates in Bright Blonde
Rihanna stepped out in a bold blonde style while marking the launch of her new Fenty x Puma collection in London in April 2024, underlining her reputation as a trendsetter both in beauty and fashion.
Delilah Belle Hamlin’s Pixie Cut
Delilah Belle Hamlin traded her long hair for a bleach-blonde pixie cut at an April 4 FRAME event, embracing a daring and youthful transformation.
Zendaya’s Honey Blonde Evolution
Zendaya added dimension to her long bob with a honey blonde color at the Challengers premiere in March 2024, less than a month after chopping her hair.
Elle Fanning’s Long Bob for Spring
Elle Fanning welcomed the spring season with a chic long bob, debuting the look on March 25, capturing the fresh energy of new beginnings.
Rachel McAdams’ Transition to Brunette
The Mean Girls alum Rachel McAdams debuted a deep brunette color on March 18, moving away from her signature blonde and showcasing a different side of her style palate.
Bre Tiesi Goes Dramatically Blonde
The Selling Sunset star Bre Tiesi stunned followers in March 2024 with a dramatic shift to platinum blonde, appearing nearly unrecognizable to her fans and followers.
Trends and Significance in Celebrity Hair Changes
This period has witnessed a wave of reinvention among stars, with icons from Kylie Jenner to Lily Collins and Megan Fox using their hair transformations to signal new chapters in their lives and careers. Whether meant as a symbol of empowerment, as seen with Sydney Sweeney, or simply as fresh starts or playful tributes to past identities, these hair changes capture the evolving nature of beauty standards and personal expression.
The Sydney Sweeney hair transformation, alongside those from a diverse slate of celebrities, not only sets new style trends but signals the importance of self-reinvention in popular culture. As entertainment’s biggest names continue to embrace bold new looks, the impact of their choices resonates beyond Hollywood, inspiring countless fans to explore changes of their own.
With red carpets and public appearances often serving as stages for these dramatic transformations, it’s likely more stars will follow suit in the months ahead, turning personal reinvention into a defining theme for 2024 and beyond.
