Millie Bobby Brown rang in her 21st birthday with a striking new look. The Stranger Things star debuted freshly dyed blonde hair, fueling rumors that she may be stepping into the role of Britney Spears in a rumored biopic.
“Thx for the bday wishes… hi 21 💞” the British actress captioned a playful video of herself slipping on a pair of sunglasses, fully embracing her milestone moment.
For the big celebration, Millie stunned in a strapless, vibrant green dress, paired with gold earrings and her blonde hair styled into chic fishtail braids.
Fans were quick to fill the comments with birthday wishes. “Happy 21st birthday, Millie! Hope you had an amazing day!” one supporter wrote.
Millie Bobby Brown went blonde just in time for her 21st birthday celebration.
“The most iconic birthday girl ❤️🔥❤️🔥❤️🔥,” one fan gushed.
Another wrote, “Eleven is 21 ❤️✨ Happy Birthday Millie @milliebobbybrown.”
Even singer Halsey chimed in with a sweet message: “Happy birthday queen!”
Following Millie’s dramatic transformation, fans began speculating once again about the possibility of her portraying Britney Spears in a future biopic.
The buzz stems from a 2022 episode of The Drew Barrymore Show, where Millie openly shared her interest in taking on the role of the pop icon.
“I wanna play a real person,” Millie shared when asked about her dream role.
She explained that Britney Spears’ journey “resonates” with her personally, noting that they both grew up in the public eye. “I think [Britney’s] story, first of all, resonates with me,” the Enola Holmes star said.
“When I look at pictures of her, I feel like I could tell her story in the right way.”
However, after the buzz reached Britney herself, the Grammy winner pushed back on the idea—taking to social media to shut down any plans for a biopic about her life.
The Stranger Things star struck a playful pose in an Instagram video, pretending a candle was a cigarette while wearing a pair of stylish sunglasses.
“I hear about people wanting to do movies about my life… dude I’m not dead!!!” Britney Spears ranted on Instagram.
“It’s pretty f**king clear they preferred me dead… I guess my family is going to lock their doors now!!!” she added, expressing outrage over the biopic speculation.
Despite her frustration, it was revealed in August 2024 that Universal Pictures had secured the rights to adapt her bestselling memoir, The Woman in Me, into a feature film.
The Toxic singer teased the upcoming film on X (formerly Twitter), revealing her involvement in a secret project with Emmy-winning producer Marc Platt—known for hits like Legally Blonde, Into the Woods, La La Land, and Wicked.
“Excited to share with my fans that I’ve been working on a secret project with #MarcPlatt. He’s always made my favorite movies… stay tuned,” Britney wrote in August 2024.
The project is currently in development under the direction of Wicked filmmaker Jon M. Chu.
Her fresh blonde hairstyle fueled speculation that she could be cast as Britney Spears in the upcoming biopic about the pop icon’s life.
Another actress excited about the possibility of portraying the iconic pop princess is Olivia Holt.
“I’m just so grateful to be considered alongside so many talented names for this role. The idea that I’m even being thought of to play someone as legendary as Britney is a dream come true,” the Runaways star shared.
“I love ‘I’m Not a Girl, Not Yet a Woman’—it’s one of my favorites. But I also adore the Circus era. Britney had so many distinct phases. How could you possibly pick just one?”
Other fan-favorite choices for the lead role include Florence Pugh, Sabrina Carpenter, Sydney Sweeney, Addison Rae, Elle Fanning, and Tate McRae.
In other Millie news, the Damsel star is gearing up for the release of the fifth and final season of Stranger Things, set to premiere later this year.
On December 20, she shared an emotional video of herself in tears while reading a heartfelt farewell speech on her last day of filming.
“Isn’t graduation supposed to bring relief, like you’re glad to leave behind the teachers and classmates? Not me. I am nowhere near ready to leave you guys.”
She went on, “I love each and every one of you, and I’ll carry the memories and bonds we’ve built together as a family forever. I love you all. Thank you.”
Although Britney initially resisted having her life portrayed on the big screen, she eventually changed her mind, permitting Universal to acquire the rights to adapt her memoir.
While waiting for the season’s release date, fans can also look forward to seeing Millie in The Electric State, a sci-fi adventure about a girl and her robot on a quest to find her long-lost brother. Directed by the Russo brothers, the film features Chris Pratt, Ke Huy Quan, Stanley Tucci, Woody Norman, and Giancarlo Esposito. It’s scheduled to premiere on Netflix on March 14.
“Ready to play Britney now,” one fan commented, expressing hope that Millie will land the lead role in the biopic.
