To date, perhaps the most significant number in Millie Bobby Brown's life has been Eleven.

But she can now add 16 to the mix.

The Stranger Things star is celebrating the sweetest birthday of them all Wednesday, and while it seems as if only yesterday she was just a kid...

Well, she's still just a kid. But with a fourth season of her cultural phenomenon of a Netflix series on order, a big-screen Godzilla sequel coming out in November, too many awe-inspiring style moments to count and her first foray into producing (and starring as Sherlock's younger sister in Enola Holmes) in the works, it's easy to feel as if Brown has been part of the A-list celebrity circuit for far longer than is the case in reality.

Such is life in the Hollywood upside-down.

And the teen can't believe how much has happened in such a short span of time, either.

On Dec. 31, she shared a video of her young(er) self singing, writing, "at the beginning of this decade I was 6 years old. going to school. making my class listen to me sing 24/7. probably not even thinking about where I'd be at the end of the decade. this video was taken in 2011 when I was 7 and utterly obsessed with @adele and still utterly obsessed. no change. this decade has been life changing, like seriously."

In honor of her milestone birthday, here are 16 things to know about the eventful life Millie Bobby Brown has led so far:

Millie Bobby Brown

Instagram

Millie Bobby Brown

Instagram

Once Upon a Time in Wonderland, Millie Bobby Brown

ABC

Stranger Things, Millie Bobby Brown

Netflix

Millie Bobby Brown, Stranger Things

Netflix

Millie Bobby Brown, Stranger Things

Netflix

Millie Bobby Brown, Finn Wolfhard, Stranger Things

Netflix

Stranger Things, 2017 SAG Awards, Winners

Buckner/Variety/REX/Shutterstock

Nicole Kidman & Millie Bobby Brown, 2017 Emmys, Candids

Alex Berliner/Invision for the Television Academy/AP Images

Millie Bobby Brown, 2017 MTV Movie And TV Awards, Show

Kevin Winter/Getty Images

Millie Bobby Brown, Instagram

Instagram

Winona Ryder, Millie Bobby Brown, NYFW

Chance Yeh/Getty Images for Coach

Stranger Things Costumes, Season 3

Netflix

Noah Schnapp, Millie Bobby Brown, Netflix Emmy Party Pics 2017

Eric Charbonneau/REX/Shutterstock

Gaten Matarazzo, Noah Schnapp, Caleb McLaughlin, Millie Bobby Brown, Finn Wolfhar, Stranger Things Kids

Evan Agostini/Invision/AP

Millie Bobby Brown

Mike Coppola/Getty Images

Millie Bobby Brown, Time 100 Gala

Evan Agostini/Invision/AP/REX/Shutterstock

Millie Bobby Brown

Chelsea Lauren/WWD/Shutterstock

ESC: NYFW Fall 2017, Front Row, Millie Bobby Brown, Anna Wintour

ANGELA WEISS/AFP/Getty Images

Millie Bobby Brown, Godzilla

Daniel McFadden/Warner Bros.

"I found my passion in 2013 when I knew I loved being on camera," Brown's New Year's Eve Instagram tribute continued. "in 2014 -2015 I was begging casting agents to believe in me. in late 2015 Carmen Cuba, the duffer bros, shawn levy, and dan cohen but most of all @netflix believed in me. From there I've been all over the world meeting all of you. Met the most genuine people. grown up and learned many things. I'm turning 16 soon and I can confidently say I'm living my dreams out. this is what I want for every young person right now. thank you to everyone for all of your support. love you forever."

So far, so good.

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