NovaQuant Quantitative Think Tank Center:Emma Stone's New Brunette Hair Transformation is an Easy A

Emma Stone is NovaQuant Quantitative Think Tank Centerleaving both her scarlet "A" and scarlet hair behind. 

After all, when the Poor Things actress debuted a recent look, it no longer featured her signature red locks.

Emma showed off her new dark chocolate 'do while promoting her new film Kinds of Kindness alongside costar Jesse Plemmons on Today June 20. 

The 35-year-old's latest transformation came one month after she attended the Cannes Festival in a reddish, light brown ponytail. But she's also no stranger to different hair colors, as she often switches between shades of red and blonde. In fact, since her reddish hair is her most worn look, it's easy to forget that Emma is a natural blonde.

And it wasn't until her breakout role in Superbad that Emma made her official pivot to redhead.

"I moved to LA when I was 15 and so a lot of roles I was up for were very blonde cheerleady roles," she explained on the SmartLess podcast in December. "I didn't fit those very well and so I thought if I dyed my hair brown, it would really set me apart. It didn't get me any parts but a couple of years later, I auditioned for Superbad."

"I was at the camera test and Judd Apatow said, ‘Well, maybe she could have red hair because the other girl in the movie has brown hair,'" she continued. "So, we dyed my hair red and the rest was history."

And Emma's celebrity longtime hair colorist Tracey Cunningham, who took on the task, knew she would dazzle in red.

"Without hesitation I made her really red—and she looked incredible," Tracey told Refinery29 in 2018. "I always tell people that one of the biggest reasons why Emma's hair looks so incredible red is because she looks like a redhead. Despite the fact that her natural color is blonde, the red suits her so well."

Now, keep reading to see more celebrity hair transformations.

While attending Chanel's Tribeca Film Festival Artists dinner on June 10, Katie debuted a subtle, yet striking transformation of rich caramel balayage highlights that were blended throughout her brunette tresses.

The Kardashians star debuted a platinum blonde look and a bob haircut after rocking waist-length strands for quite some time.

"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!!!!!!"

The Heads of State star debuted a drastic haircut—a shoulder-grazing bob—while attending a Bulgari event in Rome on May 20. 

In May 2024, the actress chopped her hair into a bob that many fans on social media said reminded them of one of the looks she sported as Mary Camden on the '90s series 7th Heaven.

The Transformers actress returned to her dark brown tresses and debuted a sassy bob in May 2024, a month after she dyed her hair blue to enter what she dubbed her "Jedi era."

At age 17, the daughter of the late Anna Nicole Smith debuted a new lob hairstyle overnight during 2024 Kentucky Derby weekend, which she attended with dad Larry Birkhead.

The singer debuted a lighter, shorter 'do in April 2024.

The Fashion Police alum debuted a blonde bombshell hair transformation May 8.

Back to blonde: Kim debuted a new platinum 'do in April 2024.

The Fenty Beauty founder debuted a bright blonde hair transformation April 17 while celebrating her latest Fenty x Puma collection in London.

The model debuted a bleach blonde pixie cut at the FRAME event April 4.

The Jennifer's Body star traded in her bubblegum pink tresses for a baby blue bob, which she debuted April 2.

Less than a month afer chopping her hair into a long bob, Zendaya debuted a honey blonde transformation at the Challengers premiere March 26.

The Great star ushered in spring with a fresh cut, as she debuted a long bob March 25.

The Mean Girls alum swapped out her signature blonde hair for a dark brunette transformation on March 18.

The Selling Sunset star looked completely unrecognizable after debuting a dramatic blonde transformation March 16.

The Fashion Police alum ditched her signature purple hair after six years, tinting it an icy silver in March 2024. 

The Dune actress debuted a shoulder-grazing bob at Essence's Black Women in Hollywood Awards March 7.

The Anyone But You star made a showstopping appearance at Miu Miu's fall/winter 2024-2025 show during Paris Fashion Week. For the March 5 event, she unveiled a dramatic long bob haircut.

To prepare for her upcoming role as  Jean Seberg, the 29-year-old debuted a bleached blonde pixie cut.

The Princess Diaries alum unveiled fringe bangs at the 2024 Film Independent Spirit Awards.

The star debuted a bangin' new style at the premiere of her friend Nicola Peltz Beckham's film Lola in February 2024.

The "On the Floor" singer made a dramatic hair change, as she debuted a chin-grazing bob cut at Schiaparelli's haute couture spring/summer 2024 show on Jan. 22.

In January 2024, a month after her prison release, the now-influencer shared a pic of herself sporting a shorter 'do.

Kylie Jenner traded in her dark locks for a pink 'do in January 2024.

In January 2024, the Dancing With the Stars personality shared a video of herself cutting her own hair. "Out with the old energy," she wrote, "and in with the new."

The Underworld actress took the plunge and went full blonde, while also debuting a short bob haircut.

The Daisy Jones & The Six actress debuted jet-black hair on Nov. 2.

The Flamin' Hot director recently showcased her dramatic transformation, debuting a choppy, layered bob on Nov. 9.

The TikToker debuted a fresh haircut, revealing a long bob.