Millie Bobby Brown bares her midriff in a mirror selfie after Netflix drops behind-the-scenes footage from the final season of Stranger Things

Millie Bobby Brown gave fans a look at her toned stomach in a set of selfies on Monday.

The 20-year-old wore a cropped pink button-down shirt that exposed part of her bare chest and midsection, paired with matching boxer shorts.

Millie kept her brown hair up in a French twist, with two front pieces hanging down, and donned gold hoops. 

The Enola Holmes actress captioned the Instagram post, 'Mirror mirror.'

Millie's pictures come after Netflix and the Duffer Brothers dropped the first look at Stranger Things's fifth and final season.

Millie Bobby Brown gave fans a look at her toned stomach in a set of selfies on Monday

Millie Bobby Brown gave fans a look at her toned stomach in a set of selfies on Monday

The behind-the-scenes footage from the set showed Jamie Campbell Bower's Vecna returning and new cast member Linda Hamilton arriving. 

'This is the season the fans have been waiting for, and we hope you're as excited as we are to get to tell the final chapter in this story,' Ross Duffer said alongside his brother, Matt, in Monday's teaser video.

The footage gave fans quick glimpses of all the main players, including Millie, Finn Wolfhard, Noah Schnapp, Caleb McLaughlin, Gaten, Matarazzo, Sadie Sink, David Harbour, Joe Keery, Winona Ryder, Maya Hawke, Natalia Dyer, Charlie Heaton, Brett Gilman, and Priah Ferguson. 

The cast also reflected on their journey since the Netflix hit first aired in 2016.

'I started when I was 10,' Millie said about her iconic character Eleven. 'I'm now turning 20 years old. It feels very weird.'

'It's just so exciting. I think this is gonna be the best season yet,' Noah, who plays Will Byers, chimed in.

Also headed to Hawkins, Indiana?

Well, the streaming platform confirmed Nell Fisher, Jake Connelly, and Alex Breaux have all signed on for one last go. 

The 20-year-old wore a cropped pink button-down shirt that exposed part of her bare chest and midsection, paired with matching boxer shorts

The 20-year-old wore a cropped pink button-down shirt that exposed part of her bare chest and midsection, paired with matching boxer shorts

Her pictures come after Netflix and the Duffer Brothers dropped the first look at Stranger Things 's fifth and final season

Her pictures come after Netflix and the Duffer Brothers dropped the first look at Stranger Things 's fifth and final season

'It's just so exciting. I think this is gonna be the best season yet,' Noah Schnapp, who plays Will Byers, told viewers

'It's just so exciting. I think this is gonna be the best season yet,' Noah Schnapp, who plays Will Byers, told viewers

Although the plot details have been kept under wraps, Caleb - who plays Lucas Sinclair - did share: 'We're about halfway through filming now and it's exciting, so much going on.'

And fans are in for a finale battle, as footage showed Vecna going up against Eleven again.

'If season 4 was big, season 5 definitely feels bigger,' Jamie Campbell Bower teased as he slipped into his costume - prosthetics and all. 

Although the viewers didn't get to see who Linda will play, the YouTube video did show her arrival to set.

The Terminator alum shared her excitement, noting, 'I love this show so much. I really am a fan.'

'I started when I was 10,' the Enola Homes star said about her iconic character Eleven. 'I'm now turning 20 years old. It feels very weird'

'I started when I was 10,' the Enola Homes star said about her iconic character Eleven. 'I'm now turning 20 years old. It feels very weird' 

Although the plot details have been kept under wraps, Caleb - who plays Lucas Sinclair - did share: 'We're about halfway through filming now and it's exciting, so much going on'

Although the plot details have been kept under wraps, Caleb - who plays Lucas Sinclair - did share: 'We're about halfway through filming now and it's exciting, so much going on'

Meanwhile, Millie has been vocal about moving on from Stranger Things over the past few years.

'I think I'm ready,' the British actress told Women's Wear Daily in August. 'It's been such a huge factor in part of my life, but it's like graduating high school, it's like senior year. You're ready to go and blossom and flourish and you're grateful for the time you've had, but it's time to create your own message and live your own life.'

And that new chapter includes her husband, Jake Bongiovi, son of rocker Jon Bon Jovi. 

The couple tied the knot in May in an intimate wedding ceremony.

According to The Sun, Jon and his wife Dorthea were there along with Millie's parents.

'It was a very low-key, romantic affair with their closest family with them as they said their vows,' they shared, with the outlet noting the pair is planning a larger ceremony for later in the year.

Something Millie predicted would happen. 

The Hollywood starlet married Jake Bongiovi, son of rocker Jon Bon Jovi, in an intimate ceremony in May

The Hollywood starlet married Jake Bongiovi, son of rocker Jon Bon Jovi, in an intimate ceremony in May

'I think probably drawing the curtains, just because there are only so many moments in life that you get only once,' she explained to the outlet. 'And to have everyone's opinions and eyes looking at that just feels unnatural to me. So I feel it's important to keep those things, those small precious moments in life, really close to your chest. I can say that the planning is going - it's so fun and it's such an exciting time in my life.' 

Along with keeping her relationship private, Millie also made a larger shift to sharing less of her life online. 

'I personally feel it wasn't adding anything to my life,' she said. 'And I felt positive when I didn't have it on my phone. I just felt like I could live my life with more confidence and freedom, mental freedom without social media. I just feel better for it. But that doesn't mean that the good social media I don't get to see: I just have a wonderful team that kind of censors it all, so that I can protect myself.'