Here's The "Stranger Things" Cast In Their First Big Role Vs. In The Movie Vs. In Real Life

They really did grow up right in front of us!

🚨Warning: There are MASSIVE spoilers ahead!🚨

Stranger Things is back, baby! And it's truly one of the most chaotic seasons yet.

Netflix

Now, six months after the Battle of Starcourt, the gang will return to take on their biggest threat yet: high school. Hopper is still missing, the Byers family moved away, and Eleven is still struggling without her powers. Oh, and there's the Upside Down, of course. With a new villain on our hands, we'll watch as our favorite characters put an end to the Upside Down once and for all.

Netflix

So, to celebrate Stranger Things' fourth season, below are some photos of the cast in their first big role vs. in the series vs. IRL:

1. Millie Bobby Brown in her first big role as Young Alice in the Once Upon a Time spinoff series Once Upon a Time in Wonderland in 2013:

ABC

Here's Millie as Eleven on Season 4 of Stranger Things:

Courtesy of Netflix

And here's Millie in real life:

Roy Rochlin / Getty Images

2. This is Finn Wolfhard in his first big role as himself in the music video for "Retro Oceans" by Facts in 2012:

Hearthefacts / youtube.com

Here's Finn as Mike Wheeler on Season 4 of Stranger Things:

Courtesy of Netflix

And here's Finn in real life:

Jacopo Raule / FilmMagic / Getty Images

3. This is Gaten Matarazzo in his first big role as Gavroche in Les Miserables in 2014:

Walter McBride / Getty Images

Here's Gaten as Dustin Henderson on Season 4 of Stranger Things:

Courtesy of Netflix

And here's Gaten in real life:

Roy Rochlin / Getty Images for Empire State Realty Trust

4. This is Caleb McLaughlin in his first big role as Noah in Noah Dreams of Origami Fortunes in 2012:

Mochi Productions / Via youtube.com

Here's Caleb as Lucas Sinclair on Season 4 of Stranger Things:

Courtesy of Netflix

And here's Caleb in real life:

Jon Kopaloff / Getty Images

5. This is Noah Schnapp in his first big role as Roger Donovan in Bridge of Spies in 2015:

Walt Disney Studios

Here's Noah as Will Byers on Season 4 of Stranger Things:

Courtesy Netflix

And here's Noah in real life:

Steve Granitz / FilmMagic / Getty Images

6. This is Sadie Sink in her first big role as Lana on The Americans in 2013:

FX

Here's Sadie as Max Mayfield on Season 4 of Stranger Things:

Courtesy of Netflix

And here's Sadie in real life:

Jon Kopaloff / Getty Images,

7. This is Priah Ferguson in her first big role as Asia on Atlanta in 2016:

FX

Here's Priah as Erica Sinclair on Season 4 of Stranger Things:

Courtesy of Netflix

And here's Priah in real life:

Jon Kopaloff / Getty Images,

8. This is Charlie Heaton in his first big role as Jason Waycott on Casualty in 2015:

BBC One

Here's Charlie as Jonathan Byers on Season 4 of Stranger Things:

Courtesy of Netflix

And here's Charlie in real life:

Emma Mcintyre / Getty Images for Netflix

9. This is Natalia Dyer in her first big role as Clarissa Granger in Hannah Montana: The Movie in 2009:

Walt Disney Studios

Here's Natalia as Nancy Wheeler on Season 4 of Stranger Things:

Courtesy of Netflix

And here's Natalia in real life:

Emma Mcintyre / Getty Images for Netflix

10. This is Joe Keery in his first big role as Emmett on Chicago Fire in 2015:

NBC

Here's Joe Keery as Steve Harrington on Season 4 of Stranger Things:

Courtesy of Netflix

And here's Joe Keery in real life:

Theo Wargo / Getty Images

11. This is Maya Hawke in her first big role as Jo March in the BBC miniseries Little Women in 2017:

BBC

Here's Maya as Robin Buckley on Season 4 of Stranger Things:

Courtesy of Netflix

And here's Maya in real life:

Emma Mcintyre / Getty Images for Netflix

12. This is Joseph Quinn in his first big role as Arthur Havisham on Dickensian in 2015:

BBC One / Everett

Here's Joseph as Eddie Munson on Season 4 of Stranger Things:

Tina Rowden / Tina Rowden/Netflix

And here's Joseph in real life:

Theo Wargo / Getty Images

13. This is Eduardo Franco in his first big role as Stu on Gamer's Guide to Pretty Much Everything in 2015:

Disney XD

Here's Eduardo as Argyle on Season 4 of Stranger Things:

Courtesy of Netflix

And here's Eduardo in real life:

Roy Rochlin / Getty Images

14. This is Winona Ryder in her first big role as Rina in Lucas in 1986:

20th Century Fox

Here's Winona Ryder as Joyce Byers on Season 4 of Stranger Things:

Atsushi Nishijima / Atsushi Nishijima/Netflix

And here's Winona in real life:

Amy Sussman / Getty Images for Deadline Hollywood

15. This is David Harbour in his first big role as Officer Shanks on As the World Turns in 1999:

CBS

Here's David as Jim Hopper on Season 4 of Stranger Things:

Courtesy of Netflix

And here's David in real life:

Cindy Ord / Getty Images

16. This is Brett Gelman in his first big role as one of the various characters he played on Human Giant in 2007:

MTV

Here's Brett as Murray Bauman on Season 4 of Stranger Things:

Tina Rowden / Tina Rowden/Netflix

And here's Brett in real life:

Jon Kopaloff / Getty Images,

17. This is Paul Reiser in his first big role as Modell in Diner in 1982:

MGM

Here's Paul as Sam Owens on Season 4 of Stranger Things:

Courtesy Netflix

And here's Paul in real life:

Amy Sussman / Getty Images for Writers Guild

18. Finally, this is Jamie Campbell Bower in his first big role as Anthony in Sweeney Todd: The Demon Barber of Fleet Street in 2007:

Paramount

Here's Jamie as Peter Ballard / One / Vecna on Season 4 of Stranger Things:

Courtesy Netflix

And here's Jamie in real life:

Theo Wargo / Getty Images