Watch: Kate Middleton Is Officially a Blonde After Major Hair TransformationPrincess Diana's hairstylist is celebrating Kate Middleton's blonde ambition After the 43-year-old debuted her lightest hairstyle yet, Sam McKnight, who served as Diana's personal stylist until her 1997 death, wasted no time brushing off Kate's haters. "I am shocked, horrified, and dismayed by all the nasty comments about the Princess of Wales today," he wrote on Instagram Sept. 4. "A woman's hair is very personal to her, it's armour, defence, confidence and so much more." Kate had showcased her new caramel blonde 'do in public earlier that day, wearing her hair in loose waves while visiting the newly renovated gardens at the Natural History Museum in London with husband Prince William. She paired the look with a neutral-toned tweed blazer, white button-down shirt, black pants and khaki-brown flats. The princess-who shares kids Prince George, 12, Princess Charlotte, 10, and Prince Louis, 7, with the Prince of Wales-had previously debuted a lighter hairstyle in late August, as she and her family traveled to a church service at Crathie Kirk, near the royal residence of Balmoral in Scotland.readKate Middleton Is Officially a Blonde After Major Hair TransformationBut while her most recent color is a major change for the natural brunette, she has been gradually lightening her hair over this past year. And she is not the only Middleton to showcase a new 'do. Her sister Pippa Middleton debuted a blunter, shorter and lighter brunette style during a rare appearance at the Formula 1 British Grand Prix in July.
Mark Cuthbert/UK Press via Getty ImagesIt has even been a summer of change for the whole royal family as Princess Anne debuted a new style for the first time in five decades in an official portrait released ahead of her 75th birthday. Read on to see more head-turning celebrity hair transformations over the years...
Sami Sheen/InstagramSami SheenThe daughter of Charlie Sheen and Denise Richards shared her at-home hair dying journey, including its many missteps, on TikTok and raved about the results. "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."Raymond Hall/GC Images; Instagram/Carrie UnderwoodCarrie UnderwoodTrading in her signature golden locks, the country music star wrote on Instagram in August 2025, "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."Shane Anthony Sinclair/Getty Images; Instagram/Jason MomoaJason MomoaIn July 2025, the actor shaved off his beard for the first time in six years to film Dune: Part Three, which required him to rock a clean shaven look to reprise his role of Duncan Idaho.
Denise Truscello/Getty Images for Live Nation Las Vegas/Instagram/NBCKelly ClarksonThe American Idol winner debuted a shorter hairdo in a July 2025 The Voice promo, trading her signature blonde waves for a shorter, darker bob style.
Instagram / Chris Pratt / Matt Baron/BEIChris PrattThe actor debuted a bearded look, which he sports on season two of The Terminal List, in June 2025.
John Nacion/Variety via Getty Images; Jun Sato/WireImageFinn WolfhardThe Stranger Things star changed up his trademark shaggy hairstyle in May 2025 by debuting a buzzcut at the 2025 Crunchyroll Anime Awards in Tokyo, Japan.
Jamie McCarthy/WireImage; Matt Baron/BEI/ShutterstockSebastian StanThe Marvel actor said goodbye to Bucky Barnes' signature long hair in April 2025, showing off a shaved head at the Los Angeles premiere of Thunderbolts*.
Jon Kopaloff/Getty Images; Steve Granitz/FilmMagicJoJo SiwaIn March 2025, the "Karma" singer debuted her rainbow mohawk at the GLAAD Media Awards. Instagram; TikTokEmily RatajkowskiIn a March 2025 TikTok video, the model called this 'do with shaggy bangs the "worst haircut of my life."Instagram / Gypsy Rose BlanchardGypsy Rose BlanchardThe Gypsy Rose: Life After Lockup star debuted a short bob in March 2025, more than two months after giving birth to her and fiancé Ken Urker's first child, daughter Aurora Urker.
Clifton Prescod/Bravo/Charles SykesWhitney RoseThe formerly blond Real Housewives of Salt Lake City star debuted a red bob on Watch What Happens Live in January 2025.
Instagram / Hailey BieberHailey BieberThe model debuted lighter locks in September 2024, a month after giving birth to her and Justin Bieber's first baby, son Jack Blues Bieber.
Pascal Le Segretain/Getty Images/Araya Doheny/FilmMagicLily CollinsThe Emily in Paris star debuted her dramatic transformation at the world premiere of her new horror 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."Sean Zanni/WireImage/John Nacion/Variety via Getty ImagesKatie HolmesWhile attending Chanel's Tribeca Film Festival Artists dinner in Ju