It feels like just yesterday we were watching a buzzed-haired Eleven stumble into a diner in Hawkins, Indiana. But if you’re wondering how old is Millie Bobby Brown today, prepare for a bit of a "where did the time go?" moment.
As of right now, in January 2026, Millie Bobby Brown is 21 years old.
She officially hit the big 2-1 milestone on February 19, 2024, meaning she’s currently navigating her early twenties with a resume that would make a seasoned Hollywood veteran blush. Honestly, it’s wild to think she’s been in our living rooms for a decade already. Most people still think of her as that 12-year-old kid with the telekinetic powers, but Millie is now a wife, a business mogul, and a mom.
The Timeline: From Marbella to Marriage
Millie was born on February 19, 2004, in Marbella, Spain. Her British parents eventually moved the family back to the UK and then to Florida, where she started acting classes basically to stay busy on Saturdays.
You’ve probably seen the old clips of her on Modern Family or Grey's Anatomy. She was just a kid then. But the real shift happened in 2016. When Stranger Things premiered, she was only 12. She spent her entire puberty in the spotlight, which is something she’s talked about quite a bit—the pressure of having millions of people watch you grow up is no joke.
Breaking Down the Major Milestones
Instead of a boring list, let's just look at the sheer speed of her life. By 13, she was an Emmy nominee. By 14, she was the youngest person ever on the Time 100 list. By 15, she launched her beauty brand, Florence by Mills.
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Most 21-year-olds are figuring out their college majors or trying to find a first job. Millie, on the other hand, is managing a massive retail empire. Just this month (January 2026), she launched her new apparel line, "Mills," exclusively at Walmart. She's moving from "prestige actress" to "mass-market icon," and it’s working.
Wait, Is She Actually Married?
Yeah, she is. This is usually the part where people get confused about her age. Because she got engaged to Jake Bongiovi (son of rock legend Jon Bon Jovi) at 19 and married him at 20, people assume she's older than she actually is.
They had a very private ceremony in May 2024, followed by a much bigger, glitzy Italian wedding later that year. If you saw the photos from their second ceremony in October 2024, it looked like something out of a movie.
- Husband: Jake Bongiovi (married 2024)
- Father-in-law: Jon Bon Jovi
- Current Status: Living in what she calls her "all-American dream."
She recently gave a speech at the 2026 Joy Awards in Riyadh—where she was named Personality of the Year—and she mentioned her daughter. In August 2025, Millie and Jake announced they had adopted a baby girl. So, at 21, she’s balancing a global acting career, a beauty line, a clothing brand, and motherhood. It’s a lot.
How Old Is Millie Bobby Brown in the Final Season of Stranger Things?
The timing of the Stranger Things finale is a big topic. Since the show has been plagued by production delays over the years, the "kids" aren't really kids anymore.
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When they filmed the very last scenes of Season 5, Millie was already into her twenties playing a character that is supposed to be in her mid-to-late teens. It’s that classic Hollywood thing where 20-somethings play high schoolers, but it hits differently when we actually watched her grow up on that specific set.
She’s been very vocal about being ready to "graduate" from the show. Honestly, can you blame her? She’s been Eleven for nearly half her life.
The Business of Being Millie
Most child stars struggle with the transition to adult fame. Millie bypassed that by becoming a producer. She didn't just star in Enola Holmes or Damsel; she helped run the show.
Her net worth in 2026 is estimated to be somewhere between $18 million and $25 million. That’s not just Netflix money. That’s "I own a majority stake in my beauty company" money. She bought out her partners in Florence by Mills back in 2020, which was a huge power move for a teenager.
What’s Next?
If you want to keep up with what she’s doing now that she’s 21, keep an eye on these projects:
- The Electric State: Her big sci-fi movie with the Russo Brothers.
- Enola Holmes 3: Currently in development, where she’ll return as the spunky detective.
- Mills at Walmart: Her new clothing line that just hit shelves this month.
Actionable Insight: If you're looking to follow Millie's career path or business moves, the best way is to keep an eye on her brand's expansion. She is moving away from just "being famous" and toward "being a brand." You can check out her new "Mills" collection at Walmart to see how she's tailoring her style for Gen Z and Gen Alpha shoppers. It’s a masterclass in how to pivot from a child star to a long-term business mogul.