By Emily Krauser
5:23 PM PDT, June 25, 2019
Look, we know it's only been three years since Stranger Things burst into the pop culture ether in 2016, but it's pretty crazy just how much the kids of the Netflix hit have grown up since then! Click through the gallery to take a look back before season three premieres on July 4.
'Stranger Things' Cast: Then
![Gaten Matarazzo, Noah Schnapp, Caleb McLaughlin, Natalia Dyer, Millie Bobby Brown and Finn Wolfhard of "Stranger Things" in August 2016](https://www.etonline.com/sites/default/files/styles/640xh/public/images/2019-06/gettyimages-598114650.jpg?width=1024&quality=80)
Let's take a look back at what all of the younger cast members of Stranger Things looked like at the Netflix hit's premiere in July 2016, shall we? (This pic, BTW, is of Gaten Matarazzo, Noah Schnapp, Caleb McLaughlin, Millie Bobby Brown and Finn Wolfhard with their co-star, Natalia Dyer, during a press day in August 2016, one month after the show premiered on July 15, 2016.)
Millie Bobby Brown
![Millie Bobby Brown at 2016 stranger things premiere](https://www.etonline.com/sites/default/files/styles/640xh/public/images/2019-06/gettyimages-546336890.jpg?width=1024&quality=80)
The British actress was 12 when the show premiere, and she looked like a little princess in a white dress with embroidered details that was reminiscent of a flower girl dress. Back then, she still wore her hair short, as it was growing out from shaving her 'do to play Eleven.
Gaten Matarazzo
![Gaten Matarazzo t the premiere of Netflix's "Stranger Things" at Mack Sennett Studios on July 11, 2016](https://www.etonline.com/sites/default/files/styles/640xh/public/images/2019-06/gettyimages-546335364.jpg?width=1024&quality=80)
The then-13-year-old Jersey native flashed his now signature grin. Gaten rocked a charcoal gray suit on the red carpet, along with a navy blue button-down and black sneakers, but it was his adorable curls that nearly stole the show!
Noah Schnapp
![Noah Schnapp at stranger things premiere in 2016](https://www.etonline.com/sites/default/files/styles/640xh/public/images/2019-06/gettyimages-546335356.jpg?width=1024&quality=80)
His character started it all! The youngest of the Stranger Things kids, Noah was just 11 at the premiere, but he looked far happier than his poor character, Will Byers, did when he got stuck in the Upside Down (we mean, duh...). The New Yorker looked older than his years, however, in a gray blazer, white button-down and dark jeans, which he accessorized with a blue-and-orange striped tie and smoke-hued sneakers.
Caleb McLaughlin
![Caleb McLaughlin at stranger things premiere 2016](https://www.etonline.com/sites/default/files/styles/640xh/public/images/2019-06/GettyImages-546328566.jpg?width=1024&quality=80)
Then 14, Caleb looked very dapper in his gray suit and bow tie.
Finn Wolfhard
![Finn Wolfhard in October 2016](https://www.etonline.com/sites/default/files/styles/640xh/public/images/2019-06/gettyimages-612898132.jpg?width=1024&quality=80)
The Canadian actor was not at the Stranger Things season one premiere, but the then-13-year-old did walk the red carpet three months later at the Shin Godzilla premiere during New York Comic Con, looking sharp in a blazer for the occasion.
'Stranger Things' Cast: Now
![Stranger Things](https://www.etonline.com/sites/default/files/styles/640xh/public/images/2019-03/st3_production_still_6.jpg?width=1024&quality=80)
These teenagers have grown up so much in just three years! Here's what they look like now, just ahead of the season three premiere on July 4...
Millie Bobby Brown
![Millie Bobby Brown at godzilla premiere](https://www.etonline.com/sites/default/files/styles/640xh/public/images/2019-06/gettyimages-1146773469.jpg?width=1024&quality=80)
So grown up! Millie has become a budding fashionista and is a regular presence at fashion week shows. In fact, she made an especially stunning turn recently in a beige strapless gown at the Godzilla: King of the Monsters premiere in London in May 2019. (And that heart bag! Swoon!)
Gaten Matarazzo
![Gaten Matarazzo in Seoul](https://www.etonline.com/sites/default/files/styles/640xh/public/images/2019-06/gettyimages-1157367479.jpg?width=1024&quality=80)
Gaten has been having a ball doing press for the Netflix show's third season -- he even made finger hearts while in Seoul, South Korea, in June 2019.
Noah Schnapp
![Noah Schnapp at 2019 mtv movie and tv awards](https://www.etonline.com/sites/default/files/styles/640xh/public/images/2019-06/gettyimages-1156172531.jpg?width=1024&quality=80)
Noah suited up in polka dots for the 2019 MTV Movie & TV Awards in June -- and his smile was as big as ever!
Caleb McLaughlin
![Caleb McLaughlin at Nickelodeon's 2019 Kids' Choice Awards](https://www.etonline.com/sites/default/files/styles/640xh/public/images/2019-06/gettyimages-1132361703.jpg?width=1024&quality=80)
So trendy! Caleb rocked a neon ensemble at the 2019 Kids' Choice Awards in March -- and he looked like such a grown up!
Finn Wolfhard
![Finn Wolfhard at 2019 MTV Movie and TV Awards](https://www.etonline.com/sites/default/files/styles/640xh/public/images/2019-06/gettyimages-1156193677.jpg?width=1024&quality=80)
Also at the MTV awards show, the curly-haired cutie showed off his unique fashion sense in a chevron-adorned black jacket and black-and-white striped pants.