Lili Reinhart Debuts Striking Brunette Hair Transformation

No need the hypothesize about Lili Reinhart’s new ‘do. 

The Riverdale alum shared pictures of her freshly brown-dyed hair on social media, hinting at her preparations for filming the upcoming adaptation of Ali Hazelwood’s hit novel “The Love Hypothesis.” This is a departure from her usual blonde style.

On July 17, Lili posted a picture on Instagram where she’s pictured with a book and her hair tied up in a bun. In the snapshot, taken in a school lab judging by her attire, the 28-year-old is seen wearing a lab coat, which aligns with her character Olive Smith’s role as a biology PhD candidate.

She also exhibited her latest hair makeover on TikTok, joining the ongoing trend known as “Illegal” by dancing alongside her co-star Tom Bateman. The duo playfully shook hands while she was dressed casually in jeans, a button-down shirt layered over a tank top, and her fresh brunette hairstyle tied up neatly in a bun.

In the video, she described herself as a third-year Ph.D. candidate seeking a fictitious romantic involvement. Later, she changed her words to portray a charismatic professor who consented to this pretend relationship, which aligns with the narrative’s progression.

Lili captioned the video, “hello Dr. Adam Carlsen,” the name of her costar’s character.

In the upcoming project, Tom will portray her romantic partner, but the actress from Chemical Hearts has been seeking support from her boyfriend Jack Martin during personal challenges, such as dealing with interstitial cystitis – a health issue that may cause bladder and pelvic pain according to the Mayo Clinic.

In her Instagram posts from January, she expressed that she wouldn’t have made it through without her partner by her side. She acknowledged that having a chronically ill girlfriend isn’t simple, as there were times when she was confined at home for months, unable to walk due to pain, and battling intense feelings of depression due to the changes in her lifestyle quality.

At that moment, Lili said, “Jack’s love and backing have been unwavering, not for a single instant, even when my body was literally disintegrating.

A while ago, Jack had assisted her too, during some of her mental health challenges, such as providing support during an emotionally taxing public event in October 2024, for instance by holding her hand.

She shared with Self magazine during an interview in January that it’s ironic, yet often unnoticed. While she was in Washington D.C., delivering a speech on mental health at the White House, she found herself sobbing and feeling defeated that very same night.

As a deeply invested admirer, I can’t help but acknowledge that she derives strength from the understanding that her presence in the spotlight may provide solace to other women navigating comparable circumstances, making them feel recognized and validated.

Lili clarified that people often don’t understand what she’s referring to when she brings it up. However, her gynecologist has mentioned that many women experience this issue. That’s why she feels it’s significant to say, ‘I’m going through the same thing too.'”, or

“Lili made it clear that people usually don’t grasp what she’s discussing when she mentions it. Nevertheless, her gynecologist has pointed out that numerous women encounter this problem. This is why she believes it’s essential to express, ‘I’m dealing with it as well.’

Keep reading for more stars’ hair transformations

The actor debuted a bearded look, which he sports on season two of The Terminal List, in June 2025.

In May 2025, the lead actor of “Stranger Things” switched his iconic messy hairdo for a close-cropped hairstyle, unveiling it at the 2025 Crunchyroll Anime Awards held in Tokyo, Japan.

In April 2025, the actor from Marvel bid farewell to Bucky Barnes’ iconic long locks, revealing a bald head at the Los Angeles premiere of the movie “Thunderbolts“.

In March 2025, the “Karma” singer debuted her rainbow mohawk at the GLAAD Media Awards. 

In a TikTok video uploaded in March 2025, the model referred to her ‘shaggy bangs hairstyle’ as “the most disappointing haircut I’ve ever received.

In March of 2025, over two months following the birth of their first child, a girl named Aurora Urker, the main character from “Gypsy Rose: Life After Lockup” showcased a stylish short bob. Her partner at the time was Ken Urker.

Previously blonde cast member from “The Real Housewives of Salt Lake City” showcased a stylish red bob cut on the “Watch What Happens Live” program in January 2025.

In September 2024, the model unveiled her newly lightened hairdo, about a month following the birth of their first child, a son named Jack Blues Bieber, who she shares with Justin Bieber.

At the global premiere of her terrifying new film, “MAXXXINE,” in June 2024, the actress who plays Emily in Paris unveiled a striking transformation.

Lily shared with Vogue, “Adjusting my hairstyle reveals various aspects of my character, and I enjoy experimenting with it. This new style and hue seem more daring yet still light-hearted, perfectly reflecting who I am at this moment.

At the Chanel Tribeca Film Festival Artists dinner in June 2024, Katie made a noticeable, yet elegant change by incorporating warm caramel balayage accents seamlessly into her brown hair.

The reality TV personality famously known as the Kardashians unveiled a new platinum blond hairstyle, complete with a short bob, having previously sported long, flowing locks for an extended period.

It seems like Kylie playfully responded to a comment on her June 8 Instagram post by saying, “Did anyone mention they missed King Kylie?” To which her sister, Khloe Kardashian, jokingly agreed, “Yes, I did! Yes, indeed!!!

The former Bravo star debuted a platinum blonde look during 2024 Paris Fashion Week Haute Couture.

In May 2024, during a Bulgari event in Rome, the leaders’ hairstyle underwent a significant transformation – a stylish bob that brushed their shoulders.

Or:

At a Bulgari event in Rome, held in May 2024, these heads of state showcased a radical new hairdo – a chic bob reaching down to their shoulders.

By May 2024, the actress had a bob cut in her hair, which several social media users found reminiscent of the style she wore as Mary Camden in the ’90s show “7th Heaven”.

In May 2024, the actress from Transformers movies switched back to her rich, chestnut-brown locks and introduced a stylish, short bob hairstyle. This change came just a month after she dyed her hair blue, marking what she referred to as her “Jedi phase.

When she was 17 years old, Dannielynn Birkhead, the daughter of the late Anna Nicole Smith, suddenly changed her hairstyle to a lob over the Kentucky Derby weekend in 2024. She attended the event alongside her father, 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.

On April 17, the creator of Fenty Beauty unveiled a stunning blonde hair makeover as she celebrated the launch of her Fenty x Puma collection in London.

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

Jennifer, famous for her role in “Jennifer’s Body”, switched out her bubblegum pink long hair for a stylish baby blue bob that she unveiled on April 2nd.

Approximately a month after getting a long bob haircut, Zendaya unveiled a golden blonde makeover at the “Challengers” premiere on March 26.

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

On March 18, the former star of “Mean Girls” opted for a striking change from her usual blond locks to a rich, dark brunette look instead.

On March 16, the star from “Selling Sunset” underwent a striking blonde makeover that left many people wondering if it was indeed her.

6 long years I’d been sporting my iconic violet locks, but come March 2024, the former Fashion Police star decided to take a refreshing plunge, transforming her hair into an icy, silvery hue that left me utterly spellbound!

On March 7, the actress from Dune showcased a chic bob hairstyle that grazes her shoulders at Essence’s Black Women in Hollywood Awards.

The actor known for “Anyone But You” stole the spotlight at Miu Miu’s fall/winter 2024-2025 fashion show during Paris Fashion Week on March 5th. She made quite an impact with her striking new long bob hairstyle.

For her impending role as Jean Seberg, she decided to adopt a short, bleach-blond pixie hairstyle at age 29.

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2025-07-18 18:48