Millie Bobby Brown rocks sparkly bustier and new blonde hair as she rings in her 21st birthday

Stranger Things superstar Millie Bobby Brown rang in her 21st birthday on Wednesday.

And the actress — who recently revealed the dark side of child stardom — acknowledged her special day by giving her nearly 64million Instagram followers a peek at her celebrations.

Brown looked nearly unrecognizable with her new blonde hair as she filmed herself sitting in front of her birthday cake at a dinner party with friends.

She looked stunning in a glittery green bustier top that paired nicely with her glamorous, glowy makeup.

The fun clip begins with Brown smirking at the camera before an offscreen friend helps her light a birthday candle in her mouth like a cigarette.

A pair of funky sunglasses are also placed over Brown’s eyes as she sticks the lit candle into the center of her cake.

Stranger Things superstar Millie Bobby Brown rang in her 21st birthday on Wednesday

And the actress acknowledged her special day by giving her nearly 64million Instagram followers a peek at her celebrations

The video — which was set to the tune of a remixed version of Aly & AJ’s Potential Breakup Song — was a hit with Brown’s celebrity friends, including Hailey Bieber, Halsey and Noah Cyrus.

In her caption, the UK star thanked her devout fans for sending her birthday wishes on social media.

‘thx for the bday wishes… hi 21,’ wrote Brown, followed by a pink heart emoji.

Since wrapping the fifth and final season of Netflix’s Stranger Things in December, Brown has been enjoying some rare downtime.

Last year, she married Jake Bongiovi, the model son of rocker Jon Bon Jovi and longtime wife Dorothea Hurley.

Jake paid tribute to Millie on her birthday by sharing a sweet post to his own Instagram.

‘Happy 21st baby. I love you so much,’ captioned the 22-year-old, who included a mirror selfie of him with a bikini-clad Millie.

Instead of embracing the Hollywood life, the happy couple have been living on a farm in rural Georgia with their many pets.

While Brown has been enjoying the ‘trad life,’ she told Vanity Fair earlier this month that it is not all tulips and sunshine. 

She admitted that there are some downsides with the ‘simple life’ approach. 

Rocking her new bleach blonde hair, Brown shared footage of herself seated in front of her birthday cake at a dinner party with friends

Brown looked stunning in a glittery green bustier top that paired nicely with her glamorous, glowy makeup

The video — which was set to the tune of a remixed version of Aly & AJ’s Potential Breakup Song — was a hit with Brown’s celebrity friends, including Hailey Bieber, Halsey and Noah Cyrus

The couple get their hands plenty dirty as they tend to sheep, goats, cows, donkeys and their beloved dog Winnie.

‘If you’re not picking up horse s**t or washing a cow with your bare hands, then that life is not made for you. At all,’ Brown shared with the magazine.

‘I’m doing it because I love it. There are maybe some trad wives out there doing it because it seems wholesome, but it is not.’

She loves animals so much she has been taking veterinary classes to help her four-legged friends out.

‘I’m able to treat wounds, take their pulse, moderate blood pressure, things like that. I do all their medical records myself,’ she revealed.

‘Now I just have to do my externship, which is like sitting in on surgeries and things like that. Adoption campaigns [on social media] are wonderful temporarily, but you really have to get in there and do the work to make a difference.’

In the same interview, Brown shared her thoughts about Stranger Things — the show that made her a household name at 11-years-old — coming to and end after nearly a decade on the air.

‘It wasn’t hitting me this entire time—until yesterday,’ said Brown. ‘I was on set, and I was like, “Well, I have one more day left.” And I started crying.

‘I don’t actually like to cry at work. I’m a really emotional person, but I try to stay super strong.

‘It made me feel so uncomfortable. Jake was like, “It’s good, you have to get it out!” and I just started welling up.’

Millie’s husband Jake Bongiovi wished her a happy birthday via Instagram on Wednesday

The couple, who wed last year, live on a rural farm in Georgia

And she told the outlet how she got into character as Eleven.

‘I implemented what I was learning as a child, or what I was going through, into her,’ she noted.

‘Eleven’s identity was a huge thing that we were kind of fighting with. Is she going to dress as a girl? Or is she gonna dress in the shirts of her adoptive father, Hopper? Or is she gonna be what her friends are helping her to be?

‘At that time in my life, I didn’t know what I wanted to look like, if I preferred more feminine looks, more masculine looks, more androgynous, more grunge. So I implemented that confusion.’